Results 41 to 50 of about 45,930 (178)

Structural and topological phase transitions in Se doping-controlled intrinsic magnetic topological material FeBi2Te4

New Journal of Physics, 2023
Defects profoundly affect the magnetic, electronic structure and topological behaviour of intrinsic magnetic topological insulators. Here, we investigate the magnetic, structural stability and topological properties of different Te atomic sites in the ...
Wen-Ti Guo, Zhigao Huang, Jian-Min Zhang
doaj   +1 more source

Tunable Dirac Fermion Dynamics in Topological Insulators [PDF]

, 2013
Three-dimensional topological insulators are characterized by insulating bulk state and metallic surface state involving Dirac fermions that behave as massless relativistic particles.
Chen, Chaoyu, Chen, Chuangtian, Dong, Xiaoli, Feng, Ya, He, Junfeng, He, Shaolong, Liang, Aiji, Liu, Guodong, Liu, Xu, Liu, Yan, Mou, Daixiang, Peng, Qinjun, Peng, Yingying, Wang, Xiaoyang, Wang, Zhimin, Xie, Zhuojin, Xu, Zuyan, Yang, Feng, Yi, Hemian, Yu, Li, Zhang, Jun, Zhang, Shenjin, Zhao, Lin, Zhou, X. J.   +23 more
core   +2 more sources

Topological Invariants and Ground-State Wave functions of Topological Insulators on a Torus

Physical Review X, 2014
We define topological invariants in terms of the ground-state wave functions on a torus. This approach leads to precisely defined formulas for the Hall conductance in four dimensions and the topological magnetoelectric θ term in three dimensions, and ...
Zhong Wang, Shou-Cheng Zhang
doaj   +1 more source

Plasmonics in Topological Insulators

Nanomaterials and Nanotechnology, 2014
With strong spin-orbit coupling, topological insulators have an insulating bulk state, characterized by a band gap, and a conducting surface state, characterized by a Dirac cone.
Yi-Ping Lai, I-Tan Lin, Kuang-Hsiung Wu, Jia-Ming Liu   +3 more
doaj   +1 more source

Interaction-driven Chern insulating phases in the α−T3 lattice with Rashba spin-orbit coupling

iScience, 2023
Summary: The magnetic interaction is a necessary ingredient to break the time-reversal symmetry in realizing quantum anomalous Hall, or Chern insulating phases.
Shi-Qing Lin, Hui Tan, Pei-Hao Fu, Jun-Feng Liu   +3 more
doaj   +1 more source

Photonic Floquet topological insulators [PDF]

SPIE Proceedings, 2013
21 pages, 5 ...
Mikael C. Rechtsman, Julia M. Zeuner, Yonatan Plotnik, Yaakov Lumer, Daniel Podolsky, Felix Dreisow, Stefan Nolte, Mordechai Segev, Alexander Szameit   +8 more
openaire   +3 more sources

Topological insulator laser: Theory [PDF]

Science, 2018
Topological protection for lasersIdeas based on topology, initially developed in mathematics to describe the properties of geometric space under deformations, are now finding application in materials, electronics, and optics. The main driver is topological protection, a property that provides stability to a system even in the presence of defects ...
Harari, Gal, Bandres, Miguel A., Lumer, Yaakov, Rechtsman, Mikael C., Chong, Y. D., Khajavikhan, Mercedeh, Christodoulides, Demetrios N., Segev, Mordechai   +7 more
openaire   +4 more sources

Interaction-driven phase transition in one dimensional mirror-symmetry protected topological insulator

SciPost Physics Core, 2022
Topological crystalline insulators are phases of matter where the crystalline symmetries solely protect the topology. In this work, we explore the effect of many-body interactions in a subclass of topological crystalline insulators, namely the mirror ...
Devendra Singh Bhakuni, Amrita Ghosh, Eytan Grosfeld
doaj   +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

Skyrmion nucleation on the surface of a topological insulator

Physical Review Research, 2022
Skyrmion nucleation induced by spin-transfer torques at an interface of a topological insulator and a ferromagnetic insulator is investigated. Due to strong spin-orbit coupling on a surface of topological insulators, which enhances the effect of spin ...
Daichi Kurebayashi, Oleg A. Tretiakov
doaj   +1 more source