Results 61 to 70 of about 44,395 (299)

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Common topological charge of several similar off-axis vortex light beams of arbitrary rotationally symmetric shape

Компьютерная оптика
We investigate the topological charge of superposition of parallel identical vortex beams of arbitrary shape – either Laguerre-Gaussian beams or Bessel-Gaussian beams or some other vortex beams with a rotationally symmetric intensity distribution.
A.A. Kovalev, V.V. Kotlyar, A.G. Nalimov
doaj   +1 more source

Ergodic sampling of the topological charge using the density of states

European Physical Journal C: Particles and Fields, 2021
In lattice calculations, the approach to the continuum limit is hindered by the severe freezing of the topological charge, which prevents ergodic sampling in configuration space.
Guido Cossu, David Lancaster, Biagio Lucini, Roberto Pellegrini, Antonio Rago   +4 more
doaj   +1 more source

Spin-polarized charge trapping cell based on a topological insulator quantum dot

, 2017
We demonstrate theoretically that a topological insulator quantum dot can be formed via double topological insulator constrictions (TICs), and can be used as a charge and/or spin carrier trap memory element.
Kai Chang, H. Yin, W. Lou, D. Zhang, Zhenhua Wu, C. Shen, Wen Yang, Liangzhong Lin   +7 more
core   +1 more source

Tailoring Li‐ion Storage and Transport in Two‐Dimensional Conjugated Metal‐Organic Frameworks via Precise Nitrogen Incorporation

Advanced Functional Materials, EarlyView.
Two nitrogen‐doped 2D conjugated metal‐organic frameworks (2D c‐MOFs, namely Cu‐Nx‐OHBA, x = 2 or 4) are synthesized, featuring precise nitrogen incorporation via rational ligand design. The Cu‐Nx‐OHBA 2D c‐MOFs are largely tailorable by varying skeletal nitrogen density, with respect to electrical conductivity, Li‐storage capacitance, and Li‐transport
Xiangyu Li, Shaoze Shi, Fucai Cui, Rashid Iqbal, Pengyu Wang, Tianrui Wu, Jingcheng Hao, Renhao Dong   +7 more
wiley   +1 more source

Hybrid Solar Cell/Triboelectric Nanogenerator Based on Stable Two‐Dimensional Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
This study highlights the integration of stable two‐dimensional covalent organic framework (COF) films as photoactive layers in hybrid nanoenergy devices. The results demonstrate their capacity to generate electricity under both sunny and rainy conditions, showcasing versatility and resilience.
Joab D. Guerrero, Susana Ramos‐Terrón, Salvador R. G. Balestra, José M. Malagón, David Aparicio, Lucia Velasco, Asterios Charisiadis, Dooshaye Moonshiram, Margarita Darder, Pilar Aranda, Bernd Wicklein, Gustavo de Miguel, Javier Pérez‐Carvajal, Eva M. García‐Frutos   +13 more
wiley   +1 more source

Arbitrary orbital angular momentum addition in second harmonic generation

New Journal of Physics, 2014
We demonstrate second harmonic generation performed with optical vortices with different topological charges imprinted on orthogonal polarizations. Besides the intuitive charge doubling, we implement arbitrary topological charge addition on the second ...
W T Buono, L F C Moraes, J A O Huguenin, C E R Souza, A Z Khoury   +4 more
doaj   +1 more source

Mesoscale Domain Evolution Mechanism during Alternating Current (AC) Poling of Relaxor Ferroelectrics

Advanced Functional Materials, EarlyView.
Ferroelectric domain variants that are energetically equivalent are expected to remain preserved during polarization reversal. However, phase‐field simulations reveal that inclined domain walls in relaxor ferroelectrics can undergo irreversible elimination during alternating current poling through a proximity effect driven by long‐range elastic ...
Yuan‐Jie Sun, Bo Wang, Long‐Qing Chen   +2 more
wiley   +1 more source

Unconventional Topological Weyl Dipole Phonon

Advanced Science
A pair of Weyl points (WPs) with opposite topological charges can exhibit an additional higher‐order Z2 topological charge, giving rise to the formation of a Z2 Weyl dipole (WD).
Jianhua Wang, Yang Wang, Feng Zhou, Wenhong Wang, Zhenxiang Cheng, Shifeng Qian, Xiaotian Wang, Zhi‐Ming Yu   +7 more
doaj   +1 more source

Topological susceptibility near Tc in SU(3) gauge theory

Physics Letters B, 2016
Topological charge susceptibility χt for pure gauge SU(3) theory at finite temperature is studied using anisotropic lattices. The over-improved stout-link smoothing method is utilized to calculate the topological charge.
Guang-Yi Xiong, Jian-Bo Zhang, Ying Chen, Chuan Liu, Yu-Bin Liu, Jian-Ping Ma   +5 more
doaj   +1 more source