Results 51 to 60 of about 53,071 (272)

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

Zeeman-field-induced valley-dependent topological phase transitions on the surface of a topological crystalline insulator SnTe

New Journal of Physics, 2016
Mirror-symmetric (001) surfaces of a topological crystalline insulator SnTe host an even number of Dirac cone structures of surface states. A Zeeman field generically gaps the surface states, leading to a 2D topological insulator.
Wei Luo, W Y Deng, L Sheng
doaj   +1 more source

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

Chiral and helical states in selective-area epitaxial heterostructure

Communications Physics, 2023
The quasi-1D chiral edge states in a quantum anomalous Hall insulator are dissipationless, while the 2D helical surface states in a topological insulator are insensitive to spin-independent scatterings due to the topological protection.
Huimin Sun, Yu Huang, Mengyun He, Yu Fu, Sikang Zheng, Bin Zhang, Chen Wang, Qing Lin He   +7 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

Inverse spin Hall effect in heterostructures “nanostructured ferromagnet/topological insulator”

EPJ Web of Conferences, 2018
Interaction between magnetization dynamics and spin polarized electronic transport has been studied for ferromagnet nanodisk situated upon a 3D topological insulator (TI) film.
Petrov P.N., Davydova M.D., Skirdkov P.N., Zvezdin K.A., Lin J.G., Huang J.C.A.   +5 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

Topological magnon insulator in insulating ferromagnet [PDF]

Physical Review B, 2013
In the ferromagnetic insulator with Dzyaloshinskii-Moriya interaction, we theoretically predict and numerically verify a topological magnon insulator, where the charge-free magnon is topologically protected to transport along the edge while it is insulating in the bulk.
Zhang, L., Ren, J., Wang, J.-S., Li, B.
openaire   +2 more sources

Scanning Tunneling Microscopy Studies of Topological Insulators Grown by Molecular Beam Epitaxy

EPJ Web of Conferences, 2012
We summarize our recent scanning tunneling microscopy (STM) study of topological insulator thin films grown by molecular beam epitaxy (MBE), which includes the observation of electron standing waves on topological insulator surface and the Landau ...
Xue Qikun, Ma Xucun, He Ke, Chen Xi
doaj   +1 more source

Current-induced switching of proximity-induced ferromagnetic surface states in a topological insulator

Nature Communications, 2021
Electrical manipulation of magnetization in devices made of topological materials may be an essential route towards future spintronics technology. Here, Mogi et al.
Masataka Mogi, Kenji Yasuda, Reika Fujimura, Ryutaro Yoshimi, Naoki Ogawa, Atsushi Tsukazaki, Minoru Kawamura, Kei S. Takahashi, Masashi Kawasaki, Yoshinori Tokura   +9 more
doaj   +1 more source