Results 41 to 50 of about 53,071 (272)

Algebraic and Geometric Mean Density of States in Topological Anderson Insulators [PDF]

, 2013
Algebraic and geometric mean density of states in disordered systems may reveal properties of electronic localization. In order to understand the topological phases with disorder in two dimensions, we present the calculated density of states for ...
Shen, Shun-Qing, Zhang, Yan-Yang
core   +2 more sources

Topological crystalline insulator nanostructures [PDF]

Nanoscale, 2014
Topological crystalline insulators are topological insulators whose surface states are protected by the crystalline symmetry, instead of the time reversal symmetry.
Shen, Jie, Cha, Judy J.
openaire   +3 more sources

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

Statistical topological insulators

Physical Review B, 2014
We define a class of insulators with gapless surface states protected from localization due to the statistical properties of a disordered ensemble, namely due to the ensemble's invariance under a certain symmetry. We show that these insulators are topological, and are protected by a $\mathbb{Z}_2$ invariant.
I. C. Fulga, B. van Heck, J. M. Edge, and A. R. Akhmerov   +3 more
openaire   +4 more sources

Proximity-induced superconductivity in (Bi1−x Sb x )2Te3 topological-insulator nanowires

Communications Materials, 2022
Topological insulator nanowires are interesting because, in the presence of superconductivity, they may host elusive Majorana fermions. Here, superconductivity in (Bi1−x Sb x )2Te3 topological-insulator nanowires is realized by using palladium diffusion,
Mengmeng Bai, Xian-Kui Wei, Junya Feng, Martina Luysberg, Andrea Bliesener, Gertjan Lippertz, Anjana Uday, Alexey A. Taskin, Joachim Mayer, Yoichi Ando   +9 more
doaj   +1 more source

Theoretical prediction of topological insulator in ternary rare earth chalcogenides

, 2010
A new class of three-dimensional topological insulator, ternary rare earth chalcogenides, is theoretically investigated with ab initio calculations. Based on both bulk band structure analysis and the direct calculation of topological surface states, we ...
Binghai Yan, Chao-Xing Liu, Hai-Jun Zhang, O. Madelung, O. Madelung, P. Rustamov, Shou-Cheng Zhang, Thomas Frauenheim, Xiao-Liang Qi   +8 more
core   +1 more source

Topological quantum phase transition from mirror to time reversal symmetry protected topological insulator

Nature Communications, 2017
Transitions between topological phases of matter protected by different symmetries remain rare. Here, Mandal et al. report a quantum phase transition from a topological crystalline insulator to a Z2 topological insulator by doping Bi into Pb1-x Sn x Se ...
Partha S. Mandal, Gunther Springholz, Valentine V. Volobuev, Ondrej Caha, Andrei Varykhalov, Evangelos Golias, Günther Bauer, Oliver Rader, Jaime Sánchez-Barriga   +8 more
doaj   +1 more source

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

Weak topological insulator with protected gapless helical states [PDF]

, 2011
A workable model for describing dislocation lines introduced into a three-dimensional topological insulator is proposed. We show how fragile surface Dirac cones of a weak topological insulator evolve into protected gapless helical modes confined to the ...
Akihiro Tanaka, H. Peng, Ken-Ichiro Imura, Yositake Takane   +3 more
core   +2 more sources