Results 61 to 70 of about 254,998 (330)

The shape of the Fermi surface

Physics Letters B, 1996
Abstract We show that in the surface region, where the matter density falls off, the local momentum distribution of a many Fermion system becomes anisotropic. The local Fermi surface has a predominantly prolate shape, with its long axis normal to the surface in both spherical and semi-infinite many Fermion systems.
Jeffrey M. Thompson, Aurel Bulgac
openaire   +2 more sources

Which Chromium–Sulfur Compounds Exist as 2D Material?

Advanced Functional Materials, EarlyView.
2D chromium sulfides synthesized using molecular beam epitaxy on graphene. Structural characterization reveals two novel 2D materials, Cr2S3‐2D, which lacks a direct bulk counterpart, and Cr223S${\rm Cr}_{2\frac{2}{3}}{\rm S}$4‐2D, a minimum thickness version of Cr5S6. However, attempts to synthesize CrS2 are unsuccessful. Both new 2D phases are stable
Affan Safeer, Mahdi Ghorbani‐Asl, Wouter Jolie, Arkady V. Krasheninnikov, Thomas Michely, Jeison Fischer   +5 more
wiley   +1 more source

The structural, magnetic, optoelectronic, and mechanical characteristics of NaGeX3 perovskites under pressure for soler-cell applications

Materials Research Express
This study examines the physical properties of germanium-based halide perovskite through Density Functional Theory (DFT) computations. The physical, optical, mechanical, and magnetic properties of NaGeX _3 (X = Cl, Br, and I) were examined with the ...
Istiak Ahmed Ovi, MD Ratul Hasan, Imtiaz Ahamed Apon, Fatema-Tuz Zahra   +3 more
doaj   +1 more source

Superlattices, Bonding-Antibonding, Fermi Surface Nesting, and Superconductivity

Condensed Matter, 2023
Raman and synchrotron THz absorption spectral measurements on MgB2 provide experimental evidence for electron orbital superlattices. In earlier work, we have detected THz spectra that show superlattice absorption peaks with low wavenumbers, for which ...
Jose A. Alarco, Ian D. R. Mackinnon
doaj   +1 more source

Single Pair of Weyl Points Evolve From Spin Group‐Protected Nodal Line in Half‐Metallic Ferromagnet V3S4

Advanced Functional Materials, EarlyView.
A spin group (SG)‐based mechanism is proposed to realize a single pair of Weyl points. PT‐symmetric nodal lines (NLs) persist under T‐breaking, protected by the combination of SG and P symmetry. When considering spin‐orbit coupling, the SG‐protected NL will split into Weyl points, which will also induce anomalous transport phenomena arising from ...
Shifeng Qian, Yao Zhang, Xiaowei Sheng, Xiuxian Yang, Gang Zhang, Junfeng Gao, Xiaotian Wang   +6 more
wiley   +1 more source

Quantum critical points of Helical Fermi Liquids

, 2010
Following our previous work, we study the quantum phase transitions which spontaneously develop ferromagnetic spin order in helical fermi liquids which breaks continuous spin-space rotation symmetry, with application to the edge states of 3d topological ...
Cenke Xu, E. I. Rashba
core   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Unlocking Ultra‐Long Cycle Stability of Li Metal Electrode by Separators Modified by Porous Red Phosphorus Nanosheets

Advanced Functional Materials, EarlyView.
Coating the standard polypropylene separator with a porous red phosphorous nanosheet greatly improves cycling performance in Li electrode cells. The phosphorus‐based surface chemistry deactivates electrolyte solvent decomposition and enhances the cleavage of F‐containing salt, resulting in an inorganic‐dominated electrolyte interphase (SEI) composition
Jiangpeng Wang, Mingzi Sun, Feng Lang, Zhijun Cai, Xitao Hu, Yao Gao, Chao Lin, Xueqiang Zhang, Bolong Huang, Quan Li   +9 more
wiley   +1 more source

Effects of Temperature Annealing on the Intrinsic Transport Mechanisms of Solution Processed Graphene Nanosheet Networks

Advanced Functional Materials, EarlyView.
Unravelling charge transport mechanisms in graphene nanosheet networks: by combining temperature‐dependent conductivity measurements with a Random Resistor Network model, this study identifies a transition from hopping‐dominated conduction to a band‐like transport mechanism.
Alessandro Grillo, Alejandro Toral‐Lopez, Damiano Marian, Aniello Pelella, Zixing Peng, Jingjing Wang, Enver Faella, Maurizio Passacantando, Antonio Di Bartolomeo, Gianluca Fiori   +9 more
wiley   +1 more source

Estimating the quasi-Fermi level of holes at the surface of semiconductor photoanodes using outer-sphere redox couples

Nature Communications
Semiconductor electrodes can catalyze photo-induced redox reactions with light illumination. Photoexcitation produces excited carriers that subsequently transfer to the front and back contacts as determined by the bulk and surface properties of the ...
Yuu Shioiri, Keisuke Obata, Yudai Kawase, Tomohiro Higashi, Masao Katayama, Markus Schleuning, Roel van de Krol, Dennis Friedrich, Fatwa Firdaus Abdi, Kazuhiro Takanabe   +9 more
doaj   +1 more source