Results 91 to 100 of about 45,930 (178)

Green's Function Method for Line Defects and Gapless Modes in Topological Insulators : Beyond Semiclassical Approach

, 2012
Defects which appear in heterostructure junctions involving topological insulators are sources of gapless modes governing the low energy properties of the systems, as recently elucidated by Teo and Kane [Physical Review B82, 115120 (2010)].
G. E. Volovik, Ken Shiozaki, M. Nakahara, Satoshi Fujimoto   +3 more
core   +1 more source

Topological Switch between Second-Order Topological Insulators and Topological Crystalline Insulators

Physical Review Letters, 2018
We investigate a topological switch between second-order topological insulators (SOTIs) and topological crystalline insulators (TCIs). Both the SOTI and the TCI are protected by the mirror and inversion symmetries, for which we define the bulk topological numbers of the same type. We take examples of square nanodisks on the square lattice and hexagonal
openaire   +4 more sources

Extended topological group structure due to average reflection symmetry

New Journal of Physics, 2015
We extend the single-particle topological classification of insulators and superconductors to include systems in which disorder preserves average reflection symmetry.
M Diez, D I Pikulin, I C Fulga, J Tworzydło   +3 more
doaj   +1 more source

Quartic-root higher-order topological insulators on decorated three-dimensional sonic crystals

APL Materials
The square-root operation provides a new scheme to create topological phases with unconventional spectrum properties. With the square-root operation, the square-root topological insulators can support paired topological boundary states in two bulk gaps ...
Zhi-Guo Geng, Ya-Xi Shen, Zhan Xiong, Liwei Duan, Zhaojiang Chen, Xue-Feng Zhu   +5 more
doaj   +1 more source

Topological insulators and thermoelectric materials

, 2012
Topological insulators (TIs) are a new quantum state of matter which have gapless surface states inside the bulk energy gap. Starting with the discovery of two dimensional TIs, the HgTe-based quantum wells, many new topological materials have been ...
Casper, Frederick, Chadov, Stanislav, Felser, Claudia, Müchler, Lukas, Yan, Binghai   +4 more
core   +1 more source

Massive Dirac surface states in topological insulator/magnetic insulator heterostructures

, 2012
Topological insulators are new states of matter with a bulk gap and robust gapless surface states protected by time-reversal symmetry. When time-reversal symmetry is broken, the surface states are gapped, which induces a topological response of the ...
E. M. Ali, Weidong Luo, Xiao-Liang Qi
core   +1 more source

Thermoelectric transport of perfectly conducting channels in two- and three-dimensional topological insulators

, 2010
Topological insulators have gapless edge/surface states with novel transport properties. Among these, there are two classes of perfectly conducting channels which are free from backscattering: the edge states of two-dimensional topological insulators and
Ar Abanov, Jairo Sinova, MacDonald D K C, O A Tretiakov, Ryuji Takahashi, Shuichi Murakami, Slack G A, Takahashi R, Wada M   +8 more
core   +1 more source

Topological insulator based Tamm plasmon polaritons

APL Photonics, 2019
Topological insulators as relatively new quantum materials with the topologically protected conducting Dirac surface state reveal fantastic electronic and photonic characteristics.
Hua Lu, Yangwu Li, Zengji Yue, Dong Mao, Jianlin Zhao   +4 more
doaj   +1 more source

Lecture Notes on Topological Crystalline Insulators

, 2018
We give an introduction to topological crystalline insulators, that is, gapped ground states of quantum matter that are not adiabatically connected to an atomic limit without breaking symmetries that include spatial transformations, like mirror or ...
Frank Schindler, H.B. Nielsen, M. Z. Hasan, Nicola A. Spaldin, Nicola Marzari, R. Jackiw, T. Senthil, Wladimir A. Benalcazar   +7 more
core   +1 more source

Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2

, 2015
The topological aspects of electrons in solids emerge in realistic matters as represented by topological insulators. They are expected to show a variety of new magneto-electric phenomena, and especially the ones hosting superconductivity are strongly ...
Ishizaka, K., Kanou, M., Okawa, K., Okuda, T., Sakano, M., Sanjo, H., Sasagawa, T.   +6 more
core   +1 more source