Results 11 to 20 of about 45,930 (178)

Hyperbolic photonic topological insulators [PDF]

Nature Communications
Topological photonics provides a new degree of freedom to robustly control electromagnetic fields. To date, most of established topological states in photonics have been employed in Euclidean space.
Lei Huang, Lu He, Weixuan Zhang, Huizhen Zhang, Dongning Liu, Xue Feng, Fang Liu, Kaiyu Cui, Yidong Huang, Wei Zhang, Xiangdong Zhang   +10 more
doaj   +2 more sources

Intrinsic magnetic topological insulators [PDF]

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   +2 more sources

Berry phase theory of planar Hall effect in topological insulators

Scientific Reports, 2018
The appearance of negative longitudinal magnetoresistance (LMR) in topological semimetals such as Weyl and Dirac semimetals is understood as an effect of chiral anomaly, whereas such an anomaly is not well-defined in topological insulators. Nevertheless,
S. Nandy, A. Taraphder, Sumanta Tewari
doaj   +2 more sources

Topological Insulators [PDF]

, 2010
Topological insulators are electronic materials that have a bulk band gap like an ordinary insulator, but have protected conducting states on their edge or surface. The 2D topological insulator is a quantum spin Hall insulator, which is a close cousin of
C. L. Kane, de Gennes, P. G., Dornhaus, R., Lenoir, B., M. Z. Hasan, Nakahara, M., Peng, H., Prange, R. E., Volkov, B. A., Volkov, B. A., Volovik, G. E., Volovik, G. E.   +11 more
core   +3 more sources

Visualization of spin-polarized surface resonances in Pb-based ternary topological insulators [PDF]

Scientific Reports
The formation of the topological surface state originates from bulk band inversion at the top of the valence band and the bottom of the conduction band.
Koichiro Yaji, Yuya Hattori, Shunsuke Yoshizawa, Shunsuke Tsuda, Fumio Komori, Youhei Yamaji, Yuto Fukushima, Kaishu Kawaguchi, Takeshi Kondo, Yuki Tokumoto, Keiichi Edagawa, Taichi Terashima   +11 more
doaj   +2 more sources

Dispersion properties of artifi cial topological insulators based on an infi nite double-periodic array of elliptical quartz elements [PDF]

Радиофизика и электроника, 2021
Subject and Purpose. Special features of all-dielectric electromagnetic analogues of topological insulators (TI) in the microwave range are considered, aiming at studying the influence of geometrical and constitutive parameters of TI elements on the ...
L.I. Ivzhenko, S.Yu. Polevoy, E.N. Odarenko, S.I. Tarapov   +3 more
doaj   +1 more source

Topologically Localized Insulators

Physical Review Letters, 2022
We show that fully-localized, three-dimensional, time-reversal-symmetry-broken insulators do not belong to a single phase of matter but can realize topologically distinct phases that are labelled by integers. The phase transition occurs only when the system becomes conducting at some filling.
Lapierre, Bastien, Neupert, Titus, Trifunovic, Luka   +2 more
openaire   +4 more sources

Topological Insulator Metamaterials

Chemical Reviews, 2023
Confinement of electromagnetic fields at the subwavelength scale via metamaterial paradigms is an established method to engineer light-matter interaction in most common material systems, from insulators to semiconductors, from metals to superconductors.
Harish N. S. Krishnamoorthy, Alexander M. Dubrovkin, Giorgio Adamo, Cesare Soci   +3 more
openaire   +5 more sources

Fractional Topological Insulators [PDF]

Physical Review Letters, 2009
We analyze generalizations of two dimensional topological insulators which can be realized in interacting, time reversal invariant electron systems. These states, which we call fractional topological insulators, contain excitations with fractional charge and statistics in addition to protected edge modes.
Levin, Michael, Stern, Ady
openaire   +3 more sources

Zeros of Green functions in topological insulators

Physical Review Research, 2022
This study demonstrates that the zeros of the diagonal components of Green functions are key quantities that can detect noninteracting topological insulators. We show that zeros of the Green functions traverse the band gap in the topological phases.
Takahiro Misawa, Youhei Yamaji
doaj   +1 more source