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Editor's Choice (editor + choice)
Selected AbstractsOptimization of AlGaN/GaN HEMTs for high frequency operationPHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 7 2006T. Palacios In the article [1] featured at Editor's Choice, the structure and processing of AlGaN/GaN high electron mobility transistors (HEMTs) have been optimized for maximum small signal gain at high frequencies. The cover picture combines the sample structure , shown schematically and in a scanning electron microscopy image , with the band diagram of the sample with an InGaN back-barrier used to increase the electron confinement in comparison to a standard HEMT. The first author, Tomás Palacios, is currently a Project Scientist at UCSB. His research interest focuses on the search of novel GaN-based transistors for mm-wave applications and biological sensors. He is one of the winners of the physica status solidi Young Researcher Awards for his outstanding presentation at the 6th International Conference on Nitride Semiconductors held in Bremen, Germany, in 2005. Further articles from ICNS-6 will also be published in phys. stat. sol. (b) 243, No. 7 (2006) and phys. stat. sol. (c) 3, No. 6 (2006). The present issue of phys. stat. sol. (a) as well as phys. stat. sol. (c) 3, No. 5 (2006) also contain papers presented at the International Conference on Nanoscale Magnetism (ICNM-2005) in Gebze, Turkey. [source] Uniaxial stress study of the Cu,H complex in ZnOPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 12 2006E. V. Lavrov The cover picture of the current issue refers to the article by Lavrov and Weber which was selected as Editor's Choice [1]. The picture shows a microscopic model of the Cu,H complex investigated in the paper. The complex consists of a substitutional Cu atom at the Zn site with an H atom located between nearby O and Cu in the basal plane of the ZnO lattice. The atoms are shown in different colors: yellow for copper, red for hydrogen, cyan for oxygen, and grey for zinc. Hydrogen forms a strong bond with the O atom which gives rise to a local vibrational mode at 3192 cm,1 investigated in the paper under uniaxial stress. The c -axis is parallel to the Cu,O bond pointing to the top of the figure. The authors work at the Institute of Applied Physics/Semiconductor Physics, TU Dresden, Germany. [source] Optical, electrical and structural characterization of CuInSe2 thin filmsPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 9 2005C. Calderón The present issue of physica status solidi (b) comprises papers presented at the XVII Latin American Symposium on Solid State Physics (SLAFES 2004) in Havana, Cuba, 6,9 December 2004. Further papers from this conference are published in phys. stat. sol. (c) 2, No. 10 (2005). The cover picture refers to the article [1] on polycrystalline CuInSe2 films by Clara Calderón et al. and shows the crystal structure of CuInSe2 (right) and that of the In-rich phase CuIn3Se5 (left) which were used for the simulation and analysis of the X-ray diffraction spectra. Clara Lilia Calderón Triana is teacher at the Solar Cells Laboratory of Universidad Nacional de Colombia in Bogotá where she has been working on solar cells and semiconductor materials since 1995. In particular, she is fabricating thin film solar cells based on CuInSe2 and Cu(In,Ga)Se2. At SLAFES 2004, Clara Calderón received the physica status solidi Young Researcher Award for her second presentation entitled "Study of electrical transport properties of ZnO thin films used as front contact of solar cells" [2] which is published as Editor's Choice of this issue. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Quasi-localized low-frequency vibrational modes of disordered solids: Study by single-molecule spectroscopyPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 15 2004A. V. Naumov Editor's Choice of this issue of physica status solidi (b) is the article [1] by Andrei V. Naumov et al. This paper is Part II (Part I see [2]) of a study on elementary excitations in glasses, presented at the 11th International Conference on Phonon Scattering in Condensed Matter, St. Petersburg, 25,30 July 2004. For his outstanding talk, Naumov received the new physica status solidi Young Researcher Award which was bestowed for the first time at this conference. The cover picture is a sketch of a glass with a single impurity molecule and one hypothetical quasi-localized vibrational mode. The broadening and shift of the chromophore spectral line are caused by the interaction with this mode. Andrei V. Naumov is senior scientific researcher and deputy head of the Molecular Spectroscopy Department of the Institute of Spectroscopy, Troitsk. His main research interests are experimental and theoretical studies of low-temperature dynamics of amorphous solids (glasses, polymers etc.) via high resolution laser selective spectroscopy techniques. The second Editor's Choice is an article by E. A. Eliseev and M. D. Glinchuk [3]. Eugene A. Eliseev is scientific researcher at the Frantsevich Institute for Problems of Materials Science of the Ukrainian National Academy of Sciences, Kiev. His research areas are the theory of size and correlation effects in ferroelectric materials as well as modelling of disordered ferroelectrics properties. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Hydrostatic pressure effects on the structural and electronic properties of carbon nanotubesPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 14 2004Rodrigo B. Capaz This issue's Editor's Choice [1] is a theoretical study of the properties of single-wall carbon nanotubes (SWNTs) under hydro-static pressure. The cover picture is a snapshot of room-temperature molecular dynamics simulations of a chiral (8,7) SWNT at a pressure of 4 GPa, where a symmetry-breaking collapse of the tube into a flat shape is observed. This paper is an invited presentation from the 11th Interna-tional Conference on High Pressure Semiconductor Physics (HPSP-11), held in Berkeley, California, USA, 2,5 August 2004. The Proceedings of this conference series have been published for the fifth time in physica status solidi (b). The first author, Rodrigo Barbosa Capaz, is Associate Professor of Physics at Universidade Federal do Rio de Janeiro and works on electronic properties and computer modeling of materials. [source] Feature Article: Bound exciton and donor,acceptor pair recombinations in ZnOPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 2 2004B. K. Meyer The article [1] features the current state of knowledge on the optical properties of excitonic and donor,acceptor pair recombination in bulk n-ZnO, as revealed by recent photo- and cathodoluminescence measurements. The cover picture is a photograph showing an unusual look at the green luminescence of rod-shaped ZnO crystals under ultraviolet excitation. The first author, Bruno K. Meyer, is professor of physics at the Justus Liebig University of Giessen. His scientific interests include synthesis of semiconductor oxides by chemical vapour deposition and magnetron sputtering, in particular with respect to doping issues, materials science of electro- and thermochromic materials, recombination phenomena and defect characterization by magnetic resonance. This issue also contains an Editor's Choice on "Evolution of molecular ordering and phase transitions in C60/C70 solid solutions" by Gabriela Rueda-Morales and Jaime Ortiz-López [2]. [source] Interwell exciton dispersion engineering, coherent phonons generation and optical detectionof exciton condensatePHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 1 2004Yu. E. Lozovik This issue's Editor's Choice [1] discusses interwell excitons in coupled quantum wells as a candidate for observation of different phases in an exciton system, including the very interesting phenomenon of Bose condensation. The cover picture shows schematically how the generation of coherent phonons and the angular distribution of the exciton photoluminescence (PL) from the quantum well system can be controlled by the external electric and magnetic fields. The first author, Yurii E. Lozovik, is head of the Laboratory of Spectroscopy of Nanostructures at the Institute of Spectroscopy and also Professor of Physics at the Moscow Physical and Technical Institute. His main interests are electron and electron,hole systems in nanostructures, cluster physics, quantum electrodynamics in a cavity, matter in strong magnetic fields, nanotechnology, ultrafast and near field optics, and computer simulations. [source] Nitrides as spintronic materialsPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 2 2003Tomasz Dietl The Guest Editors of the Proceedings of the 5th International Conference on Nitride Semiconductors (ICNS-5), Hiroshi Amano and Takashi Udagawa, have nominated the invited presentation by Tomasz Dietl [1] as Editor's Choice of the present issue of physica status solidi (b). This paper is a progress report on spintronics-related issues in Mn-based III-nitrides as potential diluted magnetic semiconductors. The cover picture shows the computed values of the Curie temperature for various p-type III,V compounds containing 5% of Mn in the S = 5/2 high spin state and 3.5 × 1020 holes per cm3, predicting that TC should exceed room temperature in the Mn-based nitrides. Thomas Dietl is head of the Low-Temperature Physics Group and professor at the Institute of Physics of the Polish Academy of Sciences. He is one of the most experienced researchers in the area of ferromagnetic semiconductors, spin-related phenomena and other current topics of semiconductor physics with many publications and invited talks at conferences and seminars world-wide. The full Proceedings of the 5th International Conference on Nitride Semiconductors (ICNS-5) are published in physica status solidi (c) , conferences and critical reviews, Vol. 0, No. 7 (November 2003) (ISBN 3-527-40489-9). Conference papers can also be found in phys. stat. sol. (a) 200, No. 1 (2003). [source] Stripe fractionalization: the quantum spin nematic and the Abrikosov latticePHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 2 2003J. Zaanen The cover picture of physica status solidi (b), taken from the Editor's Choice of this issue, shows a scheme of construction of the spin nematic ordered state and the topological interaction between spatially disconnected gauge defects. The gauge symmetry is broken by applying an external field B. The theory described in the paper [1] offers a potential explanation for recent observations of magnetic field induced antiferromagnetism in La1.9Sr0.1CuO4. The first author, Jan Zaanen, is Professor of Physics at the Instituut-Lorentz in Leiden where he works on quantum field theory in condensed matter physics, concentrating on problems in high- TC superconductivity, quantum magnetism, quantum liquid crystals, doped Mott insulators, and strongly correlated electron systems. This paper is an invited presentation from the European Conference Physics of Magnetism (PM'02), held in Pozna,, Poland, 1,5 July 2002. The proceedings of this conference are published in two parts: in the present issue of phys. stat. sol. (b) and in phys. stat. sol. (a) 196, No. 1 (2003). [source] Photoluminescence studies of isotopically enriched siliconPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 1 2003D. Karaiskaj Abstract In this issue's Editor's Choice, the first high resolution photoluminescence (PL) investigations of isotopically pure silicon are reported. The cover figure shows the PL spectrum of the no-phonon transitions of an exciton bound to the neutral aluminum acceptor in 28Si, compared with the corresponding result from natural Si. It is seen that in the isotopically purified material the lines are shifted (as indicated by the horizontal arrow) and are sharper than in natural Si. Moreover, the splitting of the A0 ground state, as shown in the level scheme of the inset, is clearly absent in the 28Si sample, demonstrating that this splitting results from the random isotopic composition in natural Si. The paper is an invited presentation from the 10th International Conference on Shallow Level Centers in Semiconductors (SLCS-10) held in Warsaw, Poland, 24-27 July 2002. This issue of phys. stat. sol. (b) contains a second paper selected as Editor's Choice, entitled "Tunable spin-injection and magnetoconductance in a novel 2DEG-ferromagnet structure" by Y. Jiang and M. B. A. Jalil [2]. [source] Martin Stutzmann: Editor, Teacher, Scientist and FriendPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 2 2005Manuel Cardona On 2 January 1995 Martin Stutzmann became Editor-in-Chief of physica status solidi, replacing Professor E. Gutsche, who had led the journal through the stormy period involving the fall of the Iron Curtain, the unification of Germany and the change in its Eastern part, where physica status solidi was based, from "socialism as found in the real world" (a German concept) to real world capitalism. In 1995 it was thought that the process had been completed (we should have known better!) and after the retirement of Prof. Gutsche the new owners of physica status solidi (Wiley-VCH) decided that a change in scientific management was desirable to adapt to the new socio-political facts and to insure the scientific continuity of the journal. Martin had moved in 1993 from my department at the Max-Planck-Institute to Munich where he soon displayed a tremendous amount of science man- agement ability during the build-up of the Walter Schottky Institute. The search for a successor as Edi- tor-in-Chief was not easy: the job was not very glamorous after the upheavals which had taken place in the editorial world following the political changes. Somebody in the Editorial Boards must have suggested Martin Stutzmann. I am sure that there was opposition: one usually looks for a well-established person ready to leave his direct involvement in science and take up a new endeavor of a more administrative nature. Nevertheless, the powers that be soon realized that Martin was an excellent, if somewhat unconventional candidate who had enough energy to remain a topnotch scientist and to lead the journal in the difficult times ahead: he was offered the job. In the negotiations that followed, he insisted in getting the administrative structures that would allow him to improve the battered quality of the journal and to continue his scientific productivity. Today we are happy to see that he succeeded in both endeavors. The journal has since grown in size and considerably improved its quality. Martin Stutzmann's scientific output has continued and today he can be found listed among the 400 most cited physicists worldwide. According to the Institute of Scientific Information (ISI) he has published nearly 400 articles in source journals; they have been cited over 4600 times. His scientific visibility has been partly responsible for the success of the journal under his leadership. When he took over in 1995 the Impact Factors of physica status solidi (a) and (b) were about 0.5. Now they oscillate around 1.0. The journals occupy places 30 (a) and 29 (b) among the 57 condensed matter publications listed in the ISI. Six years ago these places were 34 (a) and 30 (b). The journal is even better placed with respect to the so-called cited half-life which is 8.2 years for pss (a) (place 16 among 57) and 6.7 years for pss (b) (place 20 among 57). Martin, of course, has contributed with his original publications to the success of the journal, having published 36 articles in pss(a) and 32 in pss(b). I would like to some of the editorial decisions implemented under Martin's leadership. They have been largely responsible for the quantitative improvements just described. Martin introduced international standards of peer review, usually involving two anonymous referees: The increase of the rejection rate from ca. 20% to 60% followed. He discontinued the Short Notes, which had become nearly irrelevant, and replaced them, in 1997 by Rapid Research Notes (today Rapid Research Letters) with especially strict reviewing rules and a rather attractive layout. Martin's participation in many international conferences and their organization gave him a handle to acquire the publication of conference proceedings. Organizing committees usually prefer publication in international journals rather than special books because of their guaranteed future availability in libraries and the partaking in the reviewing procedure. The journal became increasingly popular along these lines, a fact which moved Martin to launch in 2002 part (c) of the journal, devoted mainly, but not exclusively, to conference articles. Martin also introduced the publication of Feature Articles, topical issues, and the instrument of the Editor's Choice to highlight articles deemed to be especially interesting. He appointed Regional Editors (6 at this point) which represent the journal in important geographic regions. He also brought the journal online, a must these days. The upheavals that followed the collapse of most of the communist world, the rapid development of science in many emerging nations and the enhanced competitiveness, even in the developed countries, have not ebbed out. Some of them are particular damaging to the reputation of science in a world increasingly skeptical of its values. I am thinking of scientific misconduct and outright fraud, in the form of plagiarism and data fabrication. physica status solidi was also afflicted by this plague: after all, it happened in the best of families. Two of the most notorious offenders of the past decade, J. H. Schön and Y. Park, also visited physica status solidi. In two courageous editorials Martin Stutzmann and Stefan Hildebrandt (Managing Editor of the journal) rapidly exposed these cases of misconduct together with other cases in which there was also good reason to suspect misconduct. Some of the articles involved were rapidly retracted by the authors, others were not. It is reassuring to say that none of them had any impact worth mentioning (1,3 citations, mostly by the authors themselves or in the editorials just mentioned). Only few journal editors dared to convey to the readers a warning that some work of those authors may be faulty even if no air-tight proof was available. However, Martin and Stefan did. We wish that Martin will remain at the helm at least another decade, before he switches to research on the liquid state as practiced in Southern France. [source] Editor's Choice: The Editor takes a closer look at some of this month's articlesCLINICAL & EXPERIMENTAL ALLERGY, Issue 10 2010Article first published online: 13 JUL 2010 No abstract is available for this article. [source] | ||||||||||