Results 31 to 40 of about 53,071 (272)

Topological Hierarchy Insulators and Topological Fractal Insulators [PDF]

EPL (Europhysics Letters), 2015
Topological insulators are new states of quantum matter with metallic edge/surface states. In this paper, we pointed out that there exists a new type of particle-hole symmetry-protected topological insulator - topological hierarchy insulator (THI), a composite topological state of a (parent) topological insulator and its defect-induced topological mid ...
He, Jing, Zang, Chun-Li, Liang, Ying, Kou, Su-Peng   +3 more
openaire   +3 more sources

Spin current generator based on topological insulator coupled to ferromagnetic insulators

AIP Advances, 2012
We propose a spin current generator based on a topological insulator current-in-plane spin valve, consisting of a 3D topological insulator sandwiched between two ferromagnetic insulator layers. The “on” and “off” states of the spin current can be toggled
M. J. Ma, M. B. A. Jalil, S. G. Tan, Y. Li, Z. B. Siu   +4 more
doaj   +1 more source

Room temperature electrically pumped topological insulator lasers

Nature Communications, 2021
Topological insulator lasers offer robustness and efficiency due to their unique properties but usually require cryogenic temperatures or optical pumping.
Jae-Hyuck Choi, William E. Hayenga, Yuzhou G. N. Liu, Midya Parto, Babak Bahari, Demetrios N. Christodoulides, Mercedeh Khajavikhan   +6 more
doaj   +1 more source

An Introduction to Topological Insulators [PDF]

, 2013
Electronic bands in crystals are described by an ensemble of Bloch wave functions indexed by momenta defined in the first Brillouin Zone, and their associated energies.
Carpentier, David, Fruchart, Michel
core   +4 more sources

Higher-order topological insulators [PDF]

Science Advances, 2018
A new class of materials that are insulating in the bulk and on surfaces but have conducting hinge channels is studied.
Schindler, Frank, Cook, Ashley M, Vergniory, Maia G, Wang, Zhijun, Parkin, Stuart S P, Bernevig, B Andrei, Neupert, Titus   +6 more
openaire   +7 more sources

Acoustic Realization of a Four-Dimensional Higher-Order Chern Insulator and Boundary-Modes Engineering

Physical Review X, 2021
We present a theoretical study and experimental realization of a system that is simultaneously a four-dimensional (4D) Chern insulator and a higher-order topological insulator.
Ze-Guo Chen, Weiwei Zhu, Yang Tan, Licheng Wang, Guancong Ma   +4 more
doaj   +1 more source

Photonic topological Anderson insulators [PDF]

Nature, 2018
20 pages, 4 ...
Stützer, Simon, Plotnik, Yonatan, Lumer, Yaakov, Titum, Paraj, Lindner, Netanel H., Segev, Mordechai, Rechtsman, Mikael C., Szameit, Alexander   +7 more
openaire   +3 more sources

Cloaking magnetic field and generating electric field with topological insulator and superconductor bi-layer sphere

AIP Advances, 2017
When an electric field is applied on a topological insulator, not only the electric field is generated, but also the magnetic field is generated, vice versa.
Jin Xu
doaj   +1 more source

Topological insulator properties of photonic kagome helical waveguide arrays

Results in Physics, 2019
We investigate topological insulator properties of the kagome helical waveguide array, by utilizing theoretical and numerical means. The time-reversal symmetry of the kagome lattice is broken by helicity, and a photonic topological insulator is formed ...
Hua Zhong, Rong Wang, Fangwei Ye, Jingwen Zhang, Lei Zhang, Yanpeng Zhang, Milivoj R. Belić, Yiqi Zhang   +7 more
doaj   +1 more source

Entanglement Chern number for three-dimensional topological insulators: Characterization by Weyl points of entanglement Hamiltonians [PDF]

, 2017
We propose characterization of the three-dimensional topological insulator by using the Chern number for the entanglement Hamiltonian (entanglement Chern number).
Araki Hiromu, Fukui Takahiro, Hatsugai Yasuhiro, 初貝 安弘   +3 more
core   +2 more sources