Results 71 to 80 of about 551,694 (368)

Photonic topological Anderson insulator in a two-dimensional atomic lattice

Comptes Rendus. Physique, 2023
Disorder in atomic positions can induce a topologically nontrivial phase—topological Anderson insulator (TAI)—for transverse electric optical quasimodes of a two-dimensional honeycomb lattice of immobile atoms.
Skipetrov, Sergey E., Wulles, Pierre
doaj   +1 more source

Dirac-Electrons-Mediated Magnetic Proximity Effect in Topological Insulator / Magnetic Insulator Heterostructures

, 2017
The possible realization of dissipationless chiral edge current in a topological insulator / magnetic insulator heterostructure is based on the condition that the magnetic proximity exchange coupling at the interface is dominated by the Dirac surface ...
Chan, Moses H W, Chang, Cui-Zu, Chen, Gang, Garlow, Joseph A, Li, Mingda, Liu, Te-Huan, Moodera, Jagadeesh, Song, Qichen, Wu, Lijun, Zhao, Weiwei, Zhu, Yimei   +10 more
core   +1 more source

A square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages

Nature Communications, 2020
Topological Insulators are a novel state of matter where spectral bands are characterized by quantized topological invariants. This unique quantized nonlocal property commonly manifests through exotic bulk phenomena and corresponding robust boundary ...
M. Kremer, Ioannis Petrides, Eric Meyer, M. Heinrich, O. Zilberberg, A. Szameit   +5 more
semanticscholar   +1 more source

Two-Dimensional Second-Order Topological Insulator in Graphdiyne. [PDF]

Physical Review Letters, 2019
A second-order topological insulator (SOTI) in d spatial dimensions features topologically protected gapless states at its (d-2)-dimensional boundary at the intersection of two crystal faces, but is gapped otherwise.
Xian-Lei Sheng, Cong Chen, Huiying Liu, Ziyu Chen, Zhi-Ming Yu, Y. Zhao, Shengyuan A. Yang   +6 more
semanticscholar   +1 more source

Topological Insulators, Topological Crystalline Insulators, Topological Semimetals and Topological Kondo Insulators

, 2014
In this Book Chapter (invited) we briefly review the basic concepts defining topological insulators and focus on elaborating on the key experimental results that revealed and established their symmetry protected (SPT) topological nature. We then present key experimental results that demonstrate magnetism, Kondo insulation, mirror chirality or ...
Hasan, M. Zahid, Xu, Su-Yang, Neupane, Madhab   +2 more
openaire   +2 more sources

Type-II quadrupole topological insulators

Physical Review Research, 2020
Modern theory of electric polarization is formulated by the Berry phase, which, when quantized, leads to topological phases of matter. Such a formulation has recently been extended to higher electric multipole moments, through the discovery of the so ...
Yan-Bin Yang, Kai Li, L.-M. Duan, Yong Xu   +3 more
doaj   +1 more source

Interface-induced sign reversal of the anomalous Hall effect in magnetic topological insulator heterostructures

Nature Communications, 2021
Berry curvature connects to exotic electronic phases hence it provides important insights to understand quantum materials. Here, the authors report sign change of the anomalous Hall effect resulted from Berry curvature change at the interface of a ...
Fei Wang, Xuepeng Wang, Yi-Fan Zhao, Di Xiao, Ling-Jie Zhou, Wei Liu, Zhidong Zhang, Weiwei Zhao, Moses H. W. Chan, Nitin Samarth, Chaoxing Liu, Haijun Zhang, Cui-Zu Chang   +12 more
doaj   +1 more source

Intrinsic magnetic topological insulators

The Innovation, 2021
Introducing magnetism into topological insulators breaks time-reversal symmetry, and the magnetic exchange interaction can open a gap in the otherwise gapless topological surface states.
Pinyuan Wang, Jun Ge, Jiaheng Li, Yanzhao Liu, Yong Xu, Jian Wang   +5 more
doaj   +1 more source

A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling [PDF]

Nature Communications, 2019
Magnetic topological insulators (TI) provide an important material platform to explore quantum phenomena such as quantized anomalous Hall effect and Majorana modes, etc.
Chaowei Hu, Kyle N. Gordon, Pengfei Liu, Jinyu Liu, Xiaoqing Zhou, Peipei Hao, Dushyant M. Narayan, E. Emmanouilidou, Hongyi Sun, Yuntian Liu, Harlan Brawer, A. P. Ramirez, L. Ding, H. Cao, Qihang Liu, D. Dessau, N. Ni   +16 more
semanticscholar   +1 more source

Electronic structure of SrSn2As2 near the topological critical point

Scientific Reports, 2017
Topological materials with exotic quantum properties are promising candidates for quantum spin electronics. Different classes of topological materials, including Weyl semimetal, topological superconductor, topological insulator and Axion insulator, etc.,
L.-Y. Rong, J.-Z. Ma, S.-M. Nie, Z.-P. Lin, Z.-L. Li, B.-B. Fu, L.-Y. Kong, X.-Z. Zhang, Y.-B. Huang, H.-M. Weng, T. Qian, H. Ding, R.-Z. Tai   +12 more
doaj   +1 more source