Results 121 to 130 of about 3,435 (211)

Weyl Ferroelectric Semimetal

, 2016
The recent discoveries of ferroelectric metal and Weyl semimetal (WSM) have stimulated a natural question: whether these two exotic states of matter can coexist in a single material or not. These two discoveries ensure us that physically it is possible since both of them share the same necessary condition, the broken inversion symmetry.
Li, Ronghan, Xu, Yuanfeng, He, Jianggang, Ullah, Sami, Li, Jiangxiu, Liu, Jun-Ming, Li, Dianzhong, Weng, Hongming, Franchini, Cesare, Chen, Xing-Qiu   +9 more
openaire   +3 more sources

Axionic Instability of Periodic Weyl-Semimetal Superstructures [PDF]

Weyl-semimetal superstructures with a spiraling position of a pair of Weyl nodes of opposite chirality can host a chiral-symmetry preserving Fermi-arc metal state, where the chirality is carried by cylindrical Fermi surfaces, electron- and hole-like ...
Li, Tommy, Breitkreiz, Maxim
core   +2 more sources

Imaging electronic states on topological semimetals using scanning tunneling microscopy

New Journal of Physics, 2016
Following the intense studies on topological insulators, significant efforts have recently been devoted to the search for gapless topological systems. These materials not only broaden the topological classification of matter but also provide a condensed ...
András Gyenis, Hiroyuki Inoue, Sangjun Jeon, Brian B Zhou, Benjamin E Feldman, Zhijun Wang, Jian Li, Shan Jiang, Quinn D Gibson, Satya K Kushwaha, Jason W Krizan, Ni Ni, Robert J Cava, B Andrei Bernevig, Ali Yazdani   +14 more
doaj   +1 more source

Magnet-free broadband unidirectional thermal emission in gradient Weyl semimetal structure [PDF]

AIP Advances
Although nonreciprocal systems based on magneto-optical materials can support unidirectional thermal emission, they require bulky devices for applying external magnetic field and are practically unfavorable.
Kang-Hyok O, Kwang-Myong Jo, Kwang-Hyon Kim   +2 more
doaj   +1 more source

Weyl semimetal and nonassociative Nambu geometry [PDF]

Physical Review B, 2016
Topological materials are characterized by an electronic band structure with nontrivial topological properties. In this paper, we introduce a basis of operators for the linear space of operators spanned by charge-neutral fermion bilinears. These band projected density operators are constructed using directly the eigenfunctions of the electronic energy ...
openaire   +2 more sources

A type of robust superlattice type-I Weyl semimetal with four Weyl nodes [PDF]

, 2019
We investigate the topological properties of the Janus superlattices WTeS and WTeSe by first-principles methods and Wannier-based tight-binding Hamiltonians. The thermal stability of the Janus structures is checked by first-principles molecular dynamics.
Meng, Lijun, Römer, Rudolf A., Wu, Jiafang, Zhong, Jianxin   +3 more
core   +1 more source

Ferromagnetic Weyl semimetal phase in a tetragonal structure

, 2017
Magnetic topological semimetals have drawn significant interest since they can combine band topology with intrinsic magnetic order. Here, we propose that ideal Weyl semimetal features can coexist with a ferromagnetic (FM) ground state in a class of ...
Zhao, J. Z., Wang, R., Chen, Z. J., Xu, H., Zhao, Y. J., Jin, Y. J.   +5 more
core   +1 more source

Evidence for Weyl fermions in a canonical heavy-fermion semimetal YbPtBi

Nature Communications, 2018
Weyl fermions are evidenced in weakly correlated electron systems, but whether they survive strong electron correlations remains obscure. Here, Guo et al.
C. Y. Guo, F. Wu, Z. Z. Wu, M. Smidman, C. Cao, A. Bostwick, C. Jozwiak, E. Rotenberg, Y. Liu, F. Steglich, H. Q. Yuan   +10 more
doaj   +1 more source

Weyl semimetal from the honeycomb array of topological insulator nanowires

, 2013
We introduce a topological semimetal phase with four isolated Weyl nodes in momentum space from a honeycomb arrangement of topological insulator nanowires. This realizes a Weyl semimetal phase in which the topological charge response is absent due to the
M. M. Vazifeh
core   +1 more source

Emergent Weyl nodes and Fermi arcs in a Floquet Weyl semimetal

, 2017
When a Dirac semimetal is subject to a circularly polarized laser, it is predicted that the Dirac cone splits into two Weyl nodes and a nonequilibrium transient state called the Floquet Weyl semimetal is realized.
Takashi Oka, Bucciantini, L., Sthitadhi Roy, Kitamura, S., Roy, S., Oka, T., Sota Kitamura, Leda Bucciantini   +7 more
core   +1 more source