Results 91 to 100 of about 52,373 (281)

Effect of external electric field on the charge density waves in one dimensional Hubbard superlattices

, 2008
We have studied the ground state of the one dimensional Hubbard superlattice structures with different unit cell sizes in the presence of electric field.
Bibhas Bhattacharyya, Dutta S, Dutta S, Jayeeta Chowdhury, Pati S K, S N Karmakar   +5 more
core   +1 more source

Magnetic Resonant X-Ray Scattering in KCuF3 [PDF]

, 2002
We study the magnetic resonant x-ray scattering (RXS) spectra around the $K$ edge of Cu in KCuF$_3$ on the basis of an {\em ab initio} calculation. We use the full-potential linearlized augmented plane wave method in the LDA$+U$ scheme, and introduce the
Igarashi, J., Takahashi, M., Usuda, M.
core   +1 more source

Inducing Ferromagnetism by Structural Engineering in a Strongly Spin‐Orbit Coupled Oxide

Advanced Functional Materials, EarlyView.
ABSTRACT Magnetic materials with strong spin‐orbit coupling (SOC) are essential for the advancement of spin‐orbitronic devices, as they enable efficient spin‐charge conversion, complex magnetic structures, spin‐valley physics, topological phases and other exotic phenomena.
Ji Soo Lim, Carmine Autieri, Merit Spring, Martin Kamp, Amar Fakhredine, Pavel Potapov, Daniel Wolf, Sergii Pylypenko, Axel Lubk, Johannes Schultz, Nicolas Perez, Börge Mehlhorn, Louis Veyrat, Mario Cuoco, Fadi Choueikan, Philippe Ohresser, Bernd Büchner, Giorgio Sangiovanni, Ralph Claessen, Michael Sing   +19 more
wiley   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Coefficient of Interband Light Absorption by InAs/Ga_xIn_1-xAs Quantum Dot Superlattice at Low Temperatures

Фізика і хімія твердого тіла, 2018
In the paper the InAs/GaxIn1-xAs superlattice system of small size cubic QDs (10 nm) has been considered. Dispersion relations for electron and hole subbands have been calculated for superlattices of different dimensionality.
V. I. Boichuk, I. V. Bilynskyi, R. I. Pazyuk   +2 more
doaj   +1 more source

Epitaxially strained [001]-(PbTiO$_3$)$_1$(PbZrO$_3$)$_1$ superlattice and PbTiO$_3$ from first principles

, 2003
The effect of layer-by-layer heterostructuring and epitaxial strain on lattice instabilities and related ferroelectric properties is investigated from first principles for the [001]-(PbTiO$_3$)$_1$(PbZrO$_3$)$_1$ superlattice and pure PbTiO$_3$ on a ...
A. Garcia, B. Noheda, C. Bungaro, Claudia Bungaro, D. Vanderbilt, D.M. Ceperley, G.-M. Rignanese, G.-M. Rignanese, H.X. Fu, J. Sigman, J.B. Neaton, J.B. Neaton, J.C. Jiang, J.P. Perdew, K. M. Rabe, M.P. Warusawithana, N.A. Pertsev, P. Hohenberg, R.D. King-Smith, S. Baroni, S.E. Park, W. Kohn, Z. Wu   +22 more
core   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices—A designed playground for honeycomb physics

APL Materials, 2015
We report the fabrication of (111)-oriented superlattice structures with alternating 2m-layers (m = 1, 2, and 3) of Ca0.5Sr0.5IrO3 perovskite and two layers of SrTiO3 perovskite on SrTiO3(111) substrates.
Daigorou Hirai, Jobu Matsuno, Hidenori Takagi   +2 more
doaj   +1 more source

Radiation‐Resistant Aluminum Alloy for Space Missions in the Extreme Environment of the Solar System

Advanced Materials, EarlyView.
A novel ultrafine‐grained aluminum crossover alloy exhibits unprecedented radiation resistance and mechanical stability under extreme irradiation doses up to 100 dpa. The exceptional resilience arises from thermodynamically stable T‐phase precipitates, enabling lightweight structural materials for next‐generation spacecraft and extraterrestrial ...
Patrick D. Willenshofer, Matheus A. Tunes, Hi T. Vo, Lukas Stemper, Markus Alfreider, Oliver Renk, Graeme Greaves, Daniel Kiener, Peter J. Uggowitzer, Stefan Pogatscher   +9 more
wiley   +1 more source

Design and Growth of Low Resistivity P-Type AlGaN Superlattice Structure

Micromachines
This work investigated the impact of periodic thickness and doping region on the doping efficiency of the P-type AlGaN superlattice. In this paper, the band structure of the simulated superlattice was analyzed.
Yang Liu, Xiaowei Zhou, Peixian Li, Bo Yang, Zhuang Zhao   +4 more
doaj   +1 more source