Acta Physica Polonica A
Vol. 145 No. 1 (2024)

The  paper of  the  month,  chosen  by  the Editor-in-Chief,  is  "Unusual Strain Resulted from InteractionBetween Permanent Magnets"  by V.I. Nizhankovskiy;


DOI: 10.12693/APhysPolA.145.57


Everybody is familiar with permanent magnets. Small, very strong permanent magnets are used in many devices, from toys to advanced electronic systems. This paper studies basic physical processes taking place in such magnets.


When a magnet is placed in a magnetic field, e.g. in the vicinity of another magnet, magnetic forces lead to stress forces and hence to deformation of the magnet. These deformations were studied in this paper. Experiments were done with cylindrical NdFeB magnets. Magnetostriction and elastic parameters of the magnet, namely the Young modulus and the Poisson ratio, were measured. Also the magnetic field distribution around the magnet was determined. The results of these investigations were used to predict the strain of the NdFeB magnet as a function of the magnetic field. All these experiments were nicely interpreted in the framework of the theory of elasticity. Thus a complete picture of processes taking place in permanent magnets is given.


Everybody who wants to learn what is going on when two strong magnets are placed close to each other should read this paper.


 


The Editor-in-Chief

Proceedings of the 11th Workshop on Quantum Chaos and Localisation Phenomena (Chaos 2023), pp. 415-504
Vol. 144 No. 6 (2023)

The 11th Workshop on Quantum Chaos and Localisation Phenomena was held in Warsaw, Poland, on May 25–26, 2023, at the Institute of Physics of the Polish Academy of Sciences. Although the end of the COVID-19 coronavirus pandemic was announced, due to its long-lasting effects and existing threats, the meeting was again fully virtual and took place on the ZOOM platform. The Workshop was organized by the Institute of Physics of the Polish Academy of Sciences, the Center for Theoretical Physics of the Polish Academy of Sciences, and the Foundation "Pro-Physica". The first of these biennial workshops was organized in 2003. Selected articles from the invited lectures, starting from the second Workshop, were published in Acta Physica Polonica A [1–9]. The main objectives of the Workshops are to assess achievements and formulate directions for new research on quantum chaos and localisation phenomena.


The Workshop gathered 30 officially registered participants from Afghanistan, China, the Czech Republic, France, Germany, Israel, Poland, Sweden, the United Kingdom, and the USA, representing experimental and theoretical physicists. Additionally, about 20 participants, mainly Ph.D. students and doctors, had the opportunity to join the Workshop via the ZOOM platform. The lectures were also attended by non-registered researchers and Ph.D. students of the Institute of Physics and the Center for Theoretical Physics on the Institute's YouTube channel. During the meeting, 18 invited lectures and 3 posters were presented. The presentations focused on the following topics: quantum chaos and non-linear classical systems, quantum and microwave graphs and billiards, localisation phenomena, topological effects, and physics of low-dimensional systems. In talks and poster presentations, theoretical and experimental problems from various fields of solid state, atomic and molecular, mathematical and statistical physics were discussed. It is noteworthy to mention that although most of the lectures were devoted to the theory of quantum chaos and many-body systems, there were also very interesting new topics, such as topological effects, chiral ensembles, and — for the first time — applications of chaotic systems to modelling metamaterials. The meeting was held online, so scientific discussions that traditionally took place during coffee breaks and social events, this time took place between lectures and during visits to the "rooms" where the posters were displayed.


On behalf of the organizers, we would like to express our gratitude to all the speakers and the authors of poster presentations for their contribution to the success of the Workshop.


We present Proceedings of the 11th Workshop on Quantum Chaos and Localisation Phenomena, in which 11 invited articles of the Workshop participants are published.


The workshop organizers acknowledge the financial support of the Ministry of Education and Science under the program "Doskonała nauka II" under the contract KONF/SN/00702023/01.


 


Szymon Bauch
Leszek Sirko


Editors of the Proceedings


 


 


[1] L. Sirko, S. Bauch, Acta Phys. Pol. A 109 (1), (2006)


[2] L. Sirko, S. Bauch, Acta Phys. Pol. A 112 (4), (2007)


[3] L. Sirko, S. Bauch, Acta Phys. Pol. A 116 (5), (2009)


[4] L. Sirko, S. Bauch, Acta Phys. Pol. A 120 (6-A), (2011)


[5] L. Sirko, S. Bauch, Acta Phys. Pol. A 124 (6), (2013)


[6] L. Sirko, S. Bauch, Acta Phys. Pol. A 128 (6), (2015)


[7] L. Sirko, S. Bauch, Acta Phys. Pol. A 132 (6), (2017)


[8] L. Sirko, S. Bauch, Acta Phys. Pol. A 136 (5), (2019)


[9] S. Bauch, L. Sirko, Acta Phys. Pol. A 140 (6), (2021)

Proceedings of "Applications of Physics in Mechanical and Material Engineering" (APMME 2023), pp. 273-414
Vol. 144 No. 5 (2023)

The works included in this special issue were presented during the fourth edition of the international scientific conference "Application of Physics in Mechanical and Materials Engineering" — APMME 2023. This conference took place on June 29, 2023 in Częstochowa. The conference was organized, as usual, by the Department of Mechanics and Fundamentals of Machine Design at the Faculty of Mechanical Engineering and Computer Science at the Czestochowa University of Technology. This year, the scientific meeting of APMME was held in conjunction with the International Exhibition of Innovation — IEI 2023. The honorary patronage over the conference and exhibition was taken by the Rector of the Czestochowa University of Technology, Professor Norbert Sczygiol. 


On behalf of the Scientific and Organizational Committee of the APMME 2023 conference, we would like to thank the Rector of the Czestochowa University of Technology for his honorary patronage over the conference. We would also like to thank the Dean of the Faculty, Professor Małgorzata Klimek, for significant help in organizing the conference. Our warm words of thanks go to all participants who kindly responded to the invitation of the Organizing Committee of the APMME 2023 conference. We would like to express our special thanks to the keynote and invited speakers. 


The APMME conference has been an international conference for two years and has become a permanent fixture in the calendar of important conferences in our country. During the meeting, participants from Poland and abroad could present and discuss the latest achievements in the field of broadly understood applications of physics in mechanical and materials engineering. Over seventy participants from Poland, Bulgaria, Canada, China, Czech Republic, India, Malaysia, Romania, Taiwan, and Turkey have registered for the APMME 2023 conference. Participants presented their works at plenary sessions and in a poster session. The conference papers submitted to the Scientific Committee were reviewed and sent for approval to the Publishing Team of Acta Physica Polonica A.


The Guest Editors would like to thank the Editorial Staff for their effort and help in preparing this issue.


 


Wojciech Sochacki
Sebastian Garus
Marcin Nabiałek
Paweł Kwiatoń


Guest Editors


 

Acta Physica Polonica A, pp. 207-272
Vol. 144 No. 4 (2023)

The  paper of  the  month,  chosen  by  the Editor-in-Chief,  is  "Micro and Nanocrystalline LuPO4(Ln3+: Nd, Pr) —Morphology, Luminescence and Inter-ionic Interplays"   by  O. Bezkrovna, P. Zdeb, O. Bezkrovnyi, R. Lisiecki, and P.J. Dereń;


DOI: 10.12693/APhysPolA.144.263


In recent years nanomaterials have been studied extensively because of their broad range of possible applications. One of the areas of applications is in biology and biomedicine, where optically active nanomaterial materials are of special interest since they provide the possibility of building various sensors. The authors of this paper studied lutetium phosphate nanoparticles, the choice of phosphates was based on their low toxicity. Also, these nanoparticles can be used as stable matrices for the introduction of luminescent ions. The paper describes the optimized synthesis process of nano- and micro-sized luminescent LuPO4 materials and their doping with Pr3+ and Nd3+ ions. Furthermore, selective excitation of Pr3+ and Nd3+ ions in co-doped materials is investigated and the luminescence properties of synthesized materials are studied. The physical mechanism of the luminescence process is investigated by the authors.


The paper presents high-level research in the subject of synthesis and photophysical and physicochemical investigation of optically active inorganic nanomaterials. I recommend it to all readers interested in nanotechnology and the physics of nanomaterials.


 


The Editor-in-Chief

Acta Physica Polonica A, pp. 135-206
Vol. 144 No. 3 (2023)

The  paper of  the  month,  chosen  by  the Editor-in-Chief,  is  "On Weyl Nodes in Ferromagnetic Weyl Semimetal"   by  U.P. Tyagi and P. Goswami;


DOI: 10.12693/APhysPolA.144.197


Crystals with non-trivial topological properties are one of the most interesting and intensively studied systems in condensed matter physics. Weyl semimetals are one of them. They are not only interesting from the point of view of basic physics but also it is expected that they can be used in fast electronics. In the present paper a simple model of ferromagnetic Weyl semimetal is studied. In spite of being simple, the model takes into account all essential ingredients of such systems: the tunneling effect, exchange field leading to ferromagnetism, chirality of the Weyl nodes and the shift of the nodes. The presence of the Weyl points of opposite chirality has been shown in the band structure. Also the Berry curvature and the anomalous Hall conductivity have been found. In addition, it has been shown that interaction with light can change the topological states, this can even lead to emergence of a novel phase with broken time reversal symmetry. This relatively simple model shows a variety of nontrivial properties that can exist in crystals. The present paper significantly broadens our knowledge about these important modern materials.


 


The Editor-in-Chief

Acta Physica Polonica A, pp. 61-134
Vol. 144 No. 2 (2023)

The  paper of  the  month,  chosen  by  the Editor-in-Chief,  is  "Application of Polarizing Optical Microscopy   in   Investigation  of  Crystallization   Kinetics  from  Smectic  CA  Phase"   by  A. Deptuch, A. Lelito and M. Urbańska;


DOI: 10.12693/APhysPolA.144.93


Liquid crystals are a very interesting class of materials exhibiting a variety of unexpected physical properties. Although studied for over one hundred years their properties are still not fully explored. The present paper deals with the crystallization process, both isothermal and non-isothermal of a compound, which exhibits the smectic synclinic C and smectic anticlinic CA phases. With the help of polarization microscopy the authors found a large hysteresis, in the phase transition between the two phases. This phase transition is shifted during cooling almost below the melting temperature of a crystal phase. Thus, the studied compound is an example of liquid crystalline mixtures that exhibit the vitrified syn-clinic Sm C phase instead of anti-clinic Sm CA.
In a nice experiment the authors show one more example of complexity and also the beauty of liquid crystals.


 


The Editor-in-Chief

Acta Physica Polonica A, pp. 1-133
Vol. 144 No. 1 (2023)


The paper of the month, chosen by the Editor-in-Chief, is "Investigation of the Teapot Effect" by Ali Kibar;  


DOI: 10.12693/APhysPolA.144.26


Physics is not only about abstract things or exotic materials, physics helps to understand every-day effects as well. Some of such effects can easily be explained, some others are rather hard. Spilling liquid from a teapot is one of such hard everyday effects. It is generally known that sometimes the liquid flowing out of a spout adheres to the outer part of it instead of flowing directly downwards. This is the teapot effect discussed in the paper.


The effect is not easy to explain since many factors contribute to the behavior of the liquid flowing out of a spout. Liquid viscosity, capillary adhesive force, ambient pressure are among the most important factors that determine the character of the flow.


All relevant hydrodynamic effects are considered in this paper. Physical analysis led to hydrodynamic equations that were solved numerically on a huge mesh. The results are illustrated by experiments with liquids flowing out of teapots having spouts covered by hydrophobic and hydrophilic surfaces. I enjoyed the experimental part of the paper – photographs of a liquid pouring out of a teapot illustrate well many aspects of effects taking place.


I strongly recommend reading this paper, I enjoyed the application of advanced physical methods to discuss an every-day effect.


 


The Editor-in-Chief


The Special Issue of Acta Physica Polonica A, pp. S1-S200
Vol. 143 No. 6 (2023)

Preface 


In 1952, an unknown student from the Mechanical Technical High School in Rzeszów, a provincial city, took first place (along with two other participants) in the First Physics Olympiad – a prestigious contest organized by the Polish Physical Society. Apart from the great splendor that befell this young student, the victory allowed him to avoid mandatory (due to the regulations of that time) employment in one of the local factories and opened the route for him to study at the University of Warsaw. There, he quickly came under the guidance of outstanding theoreticians led by Professor Leopold Infeld. This is how the successful scientific career of Professor Iwo Białynicki-Birula began, as well as that of all his students and collaborators, who for decades have been continuously drawing on his incredible intuition, brilliance, and kindness. Just as physics and the world have been changing over the past 70-years, the memories of his students who came under his mentorship are surely diverse. However, what definitely unites them all is the belief in the incredibly profound physical intuition of Our Professor, which he constantly expresses in one of his most beloved sayings: Przyroda jest łaskawa (eng. Nature is kind). Indeed, striking is his readiness to undertake risky and sometimes slightly controversial research directions. Who else, if not the Professor, would have dared to question the validity of the widely used Feynman's proof [1] or to construct a consistent formulation of a nonlinear correction to, by definition linear, quantum mechanics [2, 3]? Only the Professor and his wife, Professor Zofia Białynicka-Birula, could envision and later prove that photons can undergo splitting in an external magnetic field [4] or that the uncertainty principle, similar to that of massive particles, can also be formulated for quanta of light [5, 6]. Once, for purely bureaucratic reasons, I asked the Professor what I should put in the "scientific interests of the supervisor" section of a certain form. Without hesitation and with full conviction he answered: Theoretical Physics. Although quantum electrodynamics is his greatest passion, his horizons extend to all corners of contemporary physics, where he always finds interesting questions that are still awaiting answers.  


On the occasion of Professor Iwo Białynicki-Birula's 90th birthday, I invite everyone to read this special issue of Acta Physica Polonica A, in which his students, collaborators, and friends publish scientific papers from their respective fields of expertise. The richness of the topics covered and references to the Professor's scientific activities once again demonstrate how versatile and respected a scientist he is.


Happy Birthday, Master!


 


Guest Editor:


Tomasz Sowiński


 


 


 


Bibliographic information regarding the Special Issue


Title: Acta Physica Polonica A: Special issue in honor of scientific achievements of Professor Iwo Białynicki-Birula on his 90th birthday


Guest editor: Tomasz Sowiński


Publisher: Institute of Physics of the Polish Academy of Sciences


Volume: 143             


Number of pages: S1-S200             


Publication date: 2023                


Doi: 10.12693/APhysPolA.143.S0

Acta Physica Polonica A, pp. 345-414
Vol. 143 No. 5 (2023)

The paper of the month, chosen by the Editor-in-Chief, is "Estimation of Jiles-Atherton Parameters of Toroidal Cores using MATLAB/Simulink" by Š. Gans, J. Molnár, D. Kováč;  


DOI: 10.12693/APhysPolA.143.389


A ferromagnetic toroidal core of iron powder was studied experimentally and numerically. Hysteresis loops, major and several minor ones were detected and measured with the help of a special setup. A genetic-type algorithm was developed and used to fit parameters of a model of ferromagnetic hysteresis. Experiment and theory supported by numerical modelling lead to a proper description and deep understanding of complicated processes that take place in the studied magnetic material.


 


The Editor-in-Chief

Acta Physica Polonica A, pp. 277-344
Vol. 143 No. 4 (2023)

The paper of the month, chosen by the Editor-in-Chief, is "Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi_{2}Sr_{2}CaCu_{2}O_{8+s} Glass–Ceramic Superconductors" by K. Yakinci and Ö. Çiçek;


DOI:10.12693/APhysPolA.143.298


High-temperature superconductors play an important role in various areas of physics and technology. One of the directions of improving the quality of these materials is the creation of artificial defects, e.g. by doping. In this way, the value of the critical current can be increased. In this paper, the authors prepared the samples by the conventional glass–ceramic route. They showed that the addition of carbon nanotubes can change the critical current density by up to about 30% without significant morphological change of the material. This research makes a step forward toward better superconductive materials.


 


The Editor-in-Chief

Proceedings of the 20th National Conference on Superconductivity "New Phases, Concepts and Advances", pp. 113-214
Vol. 143 No. 2 (2023)

The 20th National Conference on Superconductivity "New Phases, Concepts, and Advances" was held in Lublin from 22nd to 26th May 2022 as a fully in-person event. The conference was organized jointly by Marie Curie-Skłodowska University, the Lublin Branch of the Polish Physical Society, and the Technical University of Lublin. Former conferences in this series were devoted initially to high-temperature superconductivity and later on, they have included several related phenomena, for example: colossal magnetoresistance, strongly correlated systems, spin and charge ordering, unconventional superconductivity, and other emergent phenomena.


This Conference focussed on topics such as high-temperature superconductors and other highly correlated systems, synergy of magnetism with superconductivity in hybrid structures, critical phenomena in superconductors and superfluids, exotic quasiparticles in topological states of matter, dynamic effects in non-equilibrium superconducting structures, and applications of conventional and unconventional superconductors. The Conference was attended by 76 participants. The opening talk was delivered by Professor Wiesław I. Gruszecki, Vice-Rector of M. Curie-Skłodowska University, who addressed important aspects concerning the retina of the human eye (Dlaczego warto zadbać, aby żółta plamka w naszym oku była naprawdę żółta). Three plenary lectures were delivered by the Professors: Józef Spałek (A brief perspective in high temperature superconductivity), Marta Z. Cieplak (Interplay of various order parameters and disorder in iron chalcogenides), and Tomasz Dietl (Exchange interactions in magnetically doped semiconductors). Also, 20 invited lectures, 23 brief contributed talks, and 23 posters were presented. The list of all presentations, along with their abstracts and a detailed time-frame, is available on the conference webpage (see sites.google.com/view/kkn2022).


We would like to thank all the attendees for their participation and for creating an exciting scientific atmosphere during the Conference. The next event of this series will be organized by colleagues from Cracow.


 


Tadeusz Domański
Nicholas Sedlmayr
Karol I. Wysokiński


Guest Editors

Acta Physica Polonica A, pp. 1-112
Vol. 143 No. 1 (2023)

The paper of the month, chosen by the Editor-in-Chief, is "In-Plane Optical Anisotropy of [001]-Oriented Asymmetrical Quantum Wells" by Djanelidze and E. Tsitsishvili; 


DOI:10.12693/AphysPolA.143.30


Despite of the fact that the optical anisotropy in quantum wells has been investigated theoretically and experimentally for many years the authors present an interesting theoretical approach to calculating optical anisotropy in asymmetric quantum wells. The analysis starts from basic symmetry considerations that lead to the appearance of anisotropy caused by asymmetry of the quantum well. Next the formulated model is applied to the in-plane optical anisotropy of [001] zinc blende quantum wells. It is shown that the asymmetry should result in the mixing of light- and heavy hole states. The paper contributes to the understanding of the role of symmetry breaking in quantum wells.


 


The Editor-in-Chief

Proceedings of the XIII International Conference on Ion Implantation and Other Applications of Ions and Electrons (ION 2022), pp. 673-788
Vol. 142 No. 6 (2022)

The papers included in this volume of Acta Physica Polonica A are a contribution to the XIII International Conference on Ion Implantation and Other Applications of Ions and Electrons ION 2022, which was held in Kazimierz Dolny, Poland, on June 27-30, 2022. The Conference was organized by Maria Curie-Skłodowska University in Lublin in cooperation with the Lublin University of Technology and the Polish Physical Society.



The Conference was attended by 44 participants from Belarus, Germany, Poland, South Africa, and Ukraine, who had the opportunity to meet in a friendly atmosphere in the beautiful historic town of  Kazimierz Dolny to exchange experience in the eld of ion implantation and the application of electron beams and plasma. The idea of the biennial ION Conferences was stimulated by the permanent interest in ion beam methods, which started from fundamental studies in ion and plasma physics and have established themselves as the standard techniques for material modication and characterization. A wide range of topics was addressed during the ION 2022 Conference, including inter alia: ion beam modication of semiconductors, metals, insulators, and polymers, microstructural investigations of ion-implanted and swift heavy ion-irradiated materials, tribological properties of metallic and ceramic plasma-deposited coatings, computer simulations of post-implantation damage and ionization processes in ion sources. The diversity of topics was a great advantage for the participants of the Conference because it oered new approaches to solving scientic and technological problems.



During the four days of plenary sessions, 14 invited talks and 2 special lectures were given, reviewing actual topics of interest to the participants. The ION 2022 Conference also featured 13 oral presentations and 27 poster contributions with detailed information. Nine persons participated in the Young Scientists Contest.



We would like to thank everyone who contributed to the organization of our Conference in the dicult year of 2022. Special thanks are due to Mr. Janusz Filiks, Dr. Andrzej Droździel, and Dr. Krzysztof Pyszniak for their work, as well as to Dr. Wolfgang Skorupa for giving us a traditional organ concert in the Fara church in Kazimierz Dolny.


 


Guest Editor:


Marcin Turek
Jerzy Żuk

Proceedings of the 50th International School & Conference on the Physics of Semiconductors “Jaszowiec 2022", pp. 561-672
Vol. 142 No. 5 (2022)

This issue of Acta Physica Polonica A includes some of the presentations given at the 50th International School & Conference on the Physics of Semiconductors “Jaszowiec 2022”. The program of this jubilee event was special. In addition to regular sessions, it included a reminiscence session on the most  important achievements in the field of semiconductor physics over past years in the institutions organizing the Conference, which are:


• Institute of Physics of the Polish Academy of Sciences,
• Faculty of Physics (Institute of Experimental Physics and Institute of Theoretical Physics), University of Warsaw,
• Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology,
• Institute of High Pressure Physics of the Polish Academy of Sciences,
• Łukasiewicz Research Network — Institute of Microelectronics and Photonics.


The program also included a session devoted to the history of two companies that developed key semiconductor technologies in Poland, i.e., VIGO Photonics and AMMONO. As every year, outstanding world experts in the broad field of semiconductor physics, working both in foreign research centers (51 participants from 19 countries) and in Poland (211 participants from 11 scientific institutions and 8 companies), took part in “Jaszowiec 2022”. The topics of the Conference focused mainly on semiconductor nanostructures, two-dimensional (2D) materials, topological states of matter, spintronics, nanophotonics, quantum computing and quantum information processing, synthesis and characterization of semiconductor materials and electron devices. The Tutorial Session (School), addressed mainly to MSc students, PhD students, and young scientists, traditionally preceded the Conference, and this year it covered the subjects of 2D materials, quantum bits, non-linear spectroscopy, and photovoltaics.


We would like to express our gratitude to the members of the Program and the Advisory Committees for their wonderful work and contribution to the success of the jubilee “Jaszowiec 2022”. The most heartfelt thanks go to Anna Reszka and the Organizing Committee led by her, who made “Jaszowiec 2022” run smoothly and retain its magical atmosphere of a friendly scientific meeting. We also address special acknowledgments to Tomasz Jakubczyk, chairman of the Tutorial Session.  Finally, we would like to thank all the sponsors of the Conference: the Ministry of Education and Science, the Polish Academy of Science, the U.S. Army Combat Capabilities Development Command, and institutions organizing “Jaszowiec”, as well as commercial sponsors: COMEF, Technolutions, EDVAC, LABIS, Dr. Eberl MBE-Komponenten GmbH, and nextnano GmbH, for their financial and material support.


 


Guest Editors: 


Agnieszka Wołoś
Maria Kamińska
Aneta Drabińska


 

All previous published issues of APPA

Dear Author, don't worry, all articles published so far in Acta Physica Polonica A can be found at ICM (Interdisciplinary Centre for Mathematical and Computational Modelling UW).


In addition, all articles are available at the National Library, Poland.