Results 91 to 100 of about 62,219 (286)

Indentation of Semiconductor Superlattices

, 1993
A study is presented of low load indentations made into GaAs/AlAs superlattices and Si/SixGe1−x strained layer superlattices. We have studied the indentation sites using high resolution scanning electron microscopy (SEM) which allows us to distinguish between the individual layers due to the differences in the secondary electron (SE) yields of the ...
Castell, M, Howie, A, Perovic, D, Whitehead, A, Ritchie, D, Churchill, A, Jones, G   +6 more
openaire   +2 more sources

Visualization of moiré superlattices

Nature Nanotechnology, 2020
Moiré superlattices in van der Waals heterostructures have given rise to a number of emergent electronic phenomena due to the interplay between atomic structure and electron correlations. Indeed, electrons in these structures have been recently found to exhibit a number of emergent properties that the individual layers themselves do not exhibit.
Leo J. McGilly, Alexander Kerelsky, Nathan R. Finney, Konstantin Shapovalov, En-Min Shih, Augusto Ghiotto, Yihang Zeng, Samuel L. Moore, Wenjing Wu, Yusong Bai, Kenji Watanabe, Takashi Taniguchi, Massimiliano Stengel, Lin Zhou, James Hone, Xiaoyang Zhu, Dmitri N. Basov, Cory Dean, Cyrus E. Dreyer, Abhay N. Pasupathy   +19 more
openaire   +3 more sources

Transient Terahertz Oscillations During Photoinduced Polarization Topology Reconfiguration in Ferroelectric Superlattices

Advanced Science, EarlyView.
Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan, Hyeon Jun Lee, Xiangwei Guo, Youngjun Ahn, Samuel D. Marks, Mohammed H. Yusuf, Matthew Dawber, James M. Glownia, Diling Zhu, Takahiro Sato, Sanghoon Song, Haidan Wen, Jia‐Mian Hu, Paul G. Evans   +13 more
wiley   +1 more source

Elimination of Bimodal Size in InAs/GaAs Quantum Dots for Preparation of 1.3-μm Quantum Dot Lasers

Nanoscale Research Letters, 2018
The device characteristics of semiconductor quantum dot lasers have been improved with progress in active layer structures. Self-assembly formed InAs quantum dots grown on GaAs had been intensively promoted in order to achieve quantum dot lasers with ...
Xiang-Bin Su, Ying Ding, Ben Ma, Ke-Lu Zhang, Ze-Sheng Chen, Jing-Lun Li, Xiao-Ran Cui, Ying-Qiang Xu, Hai-Qiao Ni, Zhi-Chuan Niu   +9 more
doaj   +1 more source

Polymorphic Superparaelectric Engineering Boosting Energy Storage Capacity in BaTiO3‐Based Ceramics

Advanced Science, EarlyView.
Herein, Ca2+ incorporation promotes the coexistence of CaTiO3‐/BaTiO3‐derived paraferroelectric states, stabilizing cubic‐orthorhombic‐tetragonal polymorphic superparaelectric phases. This minimizes polarization energy barriers, facilitating full polarization saturation without compromising efficiency.
Pan Liu, Xiang Ren, Jin Qian, Haihua Huang, Peng Li, Peng Fu, Jigong Hao, Huarong Zeng, Wei Li, Zhenxiang Cheng   +9 more
wiley   +1 more source

High‐Throughput Data Generation and Transfer Learning Enabled Microstructure‐Property Integrated Design of Nickel‐Based Powder Metallurgy Superalloy

Advanced Science, EarlyView.
An integrated transfer learning framework integrates CALPHAD simulations, diffusion‐multiple experiments, and literature data to predict long‐term microstructural stability and short‐term mechanical properties of Ni‐based powder metallurgy superalloys. Based on these model predictions, a high‐performance, low‐density alloy, USTB‐PM750, is designed from
Zixin Li, Hongtao Zhang, Zichao Peng, Yuheng Zhang, Qian Lv, Yihuan Cao, Xuqing Wang, Huadong Fu, Jianxin Xie   +8 more
wiley   +1 more source

Superconductivity and topological quantum states in two-dimensional moiré superlattices

Quantum Frontiers
Moiré superlattices have emerged as an excellent platform for investigating a plethora of exotic quantum states in condensed matter physics. Recent advancements have unveiled abundant discoveries in two-dimensional moiré superlattices.
Chuanqi Zheng, Xiaoxue Liu
doaj   +1 more source

Review of results of theoretical approaches to phonon engineering of thermodynamic properties for different quantum structures [PDF]

NBP: Nauka, bezbednost, policija, 2015
Application of nano-structures requires a knowledge of their fundamental physical (mechanical, electro-magnetic, optical, etc.) characteristics. Thermodynamic properties associated with phonon displacements through the nanosamples are particularly ...
Jacimovski Stevo K., Setrajcic Jovan P.
doaj  

Dynamics of a nanowire superlattice in an ac electric field

, 2005
With a one-band envelope function theory, we investigate the dynamics of a finite nanowire superlattice driven by an ac electric field by solving numerically the time-dependent Schroedinger equation.
Aizhen Zhang, H. Liu, Jagdeep Shah, L. C. Lew Yan Voon, M. Willatzen   +4 more
core   +1 more source

A Triple‐Nanoparticle System for Controlled Graphene Nanosheet Stacking: Enabling K/Na‐Ion Battery Anodes with Ultra‐Fast Charging Exceeding Petroleum Vehicle Refueling

Advanced Science, EarlyView.
ABSTRACT Large‐ion (K, Na) battery systems mitigate uneven global lithium distribution, while their ability to attain recharge time shorter than refueling would remove the final barrier for secondary batteries to replace petroleum vehicles. However, their large‐ion chemistry makes ultra‐fast charging an even significant challenge.
Shukai Ding, Le Zhang, Hang Li, Yang Zhang, Guoquan Suo, Bin Han, Dongfeng Sun, Wenqi Zhao, Gaohui Du, Qingmei Su, Bingshe Xu, Zhen Xu, Wei Wang   +12 more
wiley   +1 more source