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Maximal symmetrization and reduction of fields: Application to wave functions in solid-state nanostructures

S. Dalessi, M.-A. Dupertuis
2010 Physical Review B  
Its primary target is to provide an essential tool for the study and analysis of the electronic and optical properties of semiconductor quantum heterostructures with relatively high point-group symmetry  ...  For a vectorial or spinorial set of functions, the SDR technique must be completed by the use of an optimal basis in vectorial or spinorial space (in a crystal we call it the Optimal Bloch function Basis  ...  Dmitri Boiko for a thorough critical reading of the manuscript. We acknowledge financial support from Swiss NF project No.200020-109523.  ... 
doi:10.1103/physrevb.81.125106 fatcat:kfqusihmbvh2babivm4hdnlgdy

Exploiting interfacial and size effects to construct oxide superlattices with robust and tunable magnetoelectric properties at room temperature

Yurong Yang, L. Bellaiche, Jorge Íñiguez
2015 Physical Review B  
The key idea is to construct heterostructures that combine two different constituents: (1) Compound BiFeO3, which presents strong ferroelectric and antiferromagnetic orders well above room temperature,  ...  Thus, the new design strategy successfully addresses the greatest challenge in the area of magnetoelectric multiferroics, exploiting interfacial couplings and size (layer-thickness) effects to produce  ...  And we also calculated the Mn-Fe coupling in a hypothetical Bi 2 FeMnO 6 double perovskite with a BFO-like structure, its J FeMn 8.5 meV.  ... 
doi:10.1103/physrevb.91.075423 fatcat:k2byz6vsbncdbbfcdm6mcfd7wa

Historical German Contributions to Physics and Applications of Electromagnetic Oscillations and Waves [chapter]

2006 History of Wireless  
Acknowledgments The author is particularly grateful to Prof. Michael I.  ...  Petelin from the Institute of Applied Physics (Russian Academy of Science) in Nizhny Novgorod for encouraging me to prepare this paper and for giving me a  ...  From this year to 1966 his work yielded the invention of the double heterostructure laser.  ... 
doi:10.1002/0471783021.ch11 fatcat:774ifmkgz5f5llt7t6yyihvbp4

Crystal facet and surface defect engineered low dimensional CeO2 (OD, 1D, 2D) based photocatalytic materials towards energy generation and pollutant abatement

Sabiha Sultana, Sriram Mansingh, Kulamani Parida
2021 Materials Advances  
Surface defects and crystal facet engineering are the two important strategies which effectively enhance the efficiency of a photocatalyst by modulating its physiochemical properties.  ...  Aknowledgement The authors are very much thankful to the SOA University, management for their support and encouragement.  ...  So in this review we have excluded the doping concepts and its example of CeO 2 based materials.  ... 
doi:10.1039/d1ma00539a fatcat:xlpfac3eqzevjkwvhdabveqicu

Quantum coherence–driven self-organized criticality and nonequilibrium light localization

Kosmas L. Tsakmakidis, Pankaj K. Jha, Yuan Wang, Xiang Zhang
2018 Science Advances  
It is associated with two first-order phase transitions: one pertaining to the synchronization of the dynamics of the photons and the second pertaining to an inversionless lasing transition by the coherent  ...  Our system is composed of a gain-enhanced plasmonic heterostructure controlled by a coherent drive, in which photons close to the stopped-light regime interact in the presence of the active nonlinearities  ...  Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.  ... 
doi:10.1126/sciadv.aaq0465 pmid:29556531 pmcid:PMC5856489 fatcat:7sxi5h4uvbbq7kdb5oaeoym3zy

Electrical manipulation of spins in the Rashba two dimensional electron gas systems

Junsaku Nitta, Tobias Bergsten, Yoji Kunihashi, Makoto Kohda
2009 Journal of Applied Physics  
Two different QW thicknesses show inverse N s dependence of ͉␣͉ in the same heterostructures. This inverse N s dependence of ͉␣͉ is explained by the k · p perturbation theory.  ...  We present our theoretical and experimental studies on manipulation of electron spins based on the Rashba spin-orbit interaction ͑SOI͒ in semiconductor heterostructures.  ...  Thanks to this discovery, the concept of spin 1/2 was established.  ... 
doi:10.1063/1.3117232 fatcat:egh3a4iennbilbzke6fq6yde2u

Spintronic oxides grown by laser-MBE

Matthias Opel
2011 Journal of Physics D: Applied Physics  
First, the physics of ferromagnetic half-metallic oxides, such as the doped manganites, the double perovskites and magnetite is presented together with possible applications based on magnetic tunnel junctions  ...  The recent study of oxides led to the discovery of several new fascinating physical phenomena.  ...  I will show how the integration into oxide heterostructures can lead to novel functionalities and pave the way towards various applications. The topical review is organized as follows.  ... 
doi:10.1088/0022-3727/45/3/033001 fatcat:pacuyg5tszevtdfsojcxl4amfi

GaN-Based Schottky Diode [chapter]

Yaqi Wang
2018 Disruptive Wide Bandgap Semiconductors, Related Technologies, and Their Applications  
The chapter closes with challenges ahead and gives an outlook on the future development of the GaN SBDs.  ...  The chapter also discusses about the GaN lateral, quasi-vertical and vertical SBDs, and AlGaN/GaN field effect SBDs: the evolution of the epitaxial structure, processing techniques and device structure  ...  A lot of progress was made; and the best performing GaN based Schottky diode got close to SiC Figure 9 .  ... 
doi:10.5772/intechopen.77024 fatcat:grnuvuttnjajlhgji52fo4wybm

Historical perspective on the physics of artificial lighting

Claude Weisbuch
2018 Comptes rendus. Physique  
We describe the evolution of lighting technologies used throughout the ages, and how the need for improvements was such that any new technology giving better and cheaper lighting was immediately implemented  ...  Electroluminescence -the phenomenon by which LEDs directly convert electricity into light -was long thought to only be of use for indicators or flat panel displays supposed to replace the bulky cathode-ray  ...  I am grateful to the organizers of the Royal Swedish Academy of Sciences (RSAS) jubilee symposium, Light in the service of mankind -from the cosmic to the nanoscale, held at Lund University, 22-23 October  ... 
doi:10.1016/j.crhy.2018.03.001 fatcat:rbaxzwcdz5dlxgxim5urm23y7i

Coupling charge and topological reconstructions at polar oxide interfaces [article]

T.C. van Thiel, W. Brzezicki, C. Autieri, J.R. Hortensius, D. Afanasiev, N. Gauquelin, D. Jannis, N. Janssen, D.J. Groenendijk, J. Fatermans, S. van Aert, J. Verbeeck (+2 others)
2021 arXiv   pre-print
Our results illustrate how the topological and magnetic features of oxides can be manipulated by engineering charge discontinuities at oxide interfaces.  ...  In oxide heterostructures, different materials are integrated into a single artificial crystal, resulting in a breaking of inversion-symmetry across the heterointerfaces.  ...  We have thickness, both heterostructures tend towards the same behav- visualized this concept in Fig. 4a, where the sources of Berry ior of the AHE i.e., a negative at all temperatures  ... 
arXiv:2107.03359v1 fatcat:gviczpqqy5ccdgof4wbwphgtvm

From structure to structural dynamics: Ahmed Zewail's legacy

Majed Chergui, John Meurig Thomas
2017 Structural Dynamics  
At the bottom of the Egyptian obelisk the two "precursors," UED and UEC, are shown, and the "ultimate" development of UEM is displayed at the apex of the obelisk. From A. H.  ...  Developments and the range of applications of 4D UEM. On the left, the techniques developed over the last decade are indicated.  ...  As an example, it is known that hydrogen bonds bind the double-stranded DNA helix and determine the complementary of the pairing.  ... 
doi:10.1063/1.4998243 pmid:28868324 pmcid:PMC5562505 fatcat:tzwxcw2pqfghpiwvyybg2d36ra

A modern perspective on the history of semiconductor nitride blue light sources

Herbert Paul Maruska, Walden Clark Rhines
2015 Solid-State Electronics  
In this paper we shall discuss the development of blue light-emitting (LED) and laser diodes (LD), starting early in the 20th century.  ...  In 2014, the scientists who achieved these critical results were awarded the Nobel Prize in Physics.  ...  The next step was to build a double heterostructure device, where the GaN active layer was sandwiched between two Al x Ga 1Àx N confinement layers. This took Akasaki and Amano another two years.  ... 
doi:10.1016/j.sse.2015.04.010 fatcat:dcsgtvgkjnckjajwyfpdhvfg6e

A Survey on the Nonlinear Analysis of Quantum Dot Semiconductor Lasers

George André Pereira Thé
2015 Learning and Nonlinear Models  
Abstract -Quantum dot semiconductor lasers constitute a recent type of laser sources for a variety of applications ranging from optical communications to biomedical instrumentation, and it appears as a  ...  To offer readers an introduction to the modeling of these devices, in this paper a survey on the quantum dot lasers is presented, with emphasis on the achievements of the literature in the last 10 years  ...  It was revealed that at low current injection levels, the largest positive Lyapunov exponent obtained when the direct capture phenomenon is present was almost the double that of when it was neglected.  ... 
doi:10.21528/lnlm-vol13-no2-art3 fatcat:sajn2gsctvdqzlgrssad6xdnla

Degradation-by-design: how chemical functionalization enhances the biodegradability and safety of 2D materials

Baojin Ma, Cristina Martín, Rajendra Kurapati, Alberto Bianco
2020 Chemical Society Reviews  
The assessment of their biodegradability is one of the fundamental aspects for their safe application.  ...  A large number of graphene and other 2D materials are currently explored for the development of new technologies.  ...  Acknowledgements The authors gratefully acknowledge the financial support from the EU Graphene Flagship project (no. 785219).  ... 
doi:10.1039/c9cs00822e pmid:32724940 fatcat:6hv7nh2wqngenp5jvqzzrwuv4i

Dirac quantum well engineering on the surface of topological insulator [article]

Xin Lu, Mark-Oliver Goerbig
2020 arXiv   pre-print
We investigate possible hybridization between these interface states as a function of the width of the topological material and of the characteristic interface size.  ...  More specifically, we consider smooth interfaces between these different types of materials such that the interfaces host not only the chiral interface states, whose existence is dictated by the bulk-edge  ...  More importantly for the present work, a thin TI sandwiched between two trivial insulators, such as in a CdTe/HgTe/CdTe heterostructure that is commonly said to be a single QW, can be viewed as a double  ... 
arXiv:2007.13978v2 fatcat:go3y7ziv6jb6bofjso7l6gbl54
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