Results 81 to 90 of about 45,930 (178)

Photonic Topological Insulators

Nonlinear Optics, 2013
Photonic systems are naturally an excellent avenue to study fundamental concepts of waves' interactions, and many times lead to new discoveries. In this context, the recent breakthroughs on photonic topological insulators will be discussed, with an emphasis on fundamental aspects that are universal to many waves systems in nature.
openaire   +2 more sources

Third-order topological insulators with wallpaper fermions in Tl4PbTe3 and Tl4SnTe3

npj Computational Materials, 2022
Nonsymmorphic symmetries open up horizons of exotic topological boundary states and even generalize the bulk–boundary correspondence, which, however, the third-order topological insulator in electronic materials are still unknown.
Ning Mao, Hao Wang, Ying Dai, Baibiao Huang, Chengwang Niu   +4 more
doaj   +1 more source

Classification and Prediction of Topological Insulators by Using the Density of States

Mathematics
In order to characterize topological insulators it is customary to use representations of the electronic structure, such as the band structure, where the energy of electrons is represented as a function of their momenta.
Alejandro Díaz-Nadales, Zulima Fernández-Muñiz, Juan L. Fernández-Martínez, Víctor M. García-Suárez   +3 more
doaj   +1 more source

Discovery of higher-order topological insulators using the spin Hall conductivity as a topology signature

npj Computational Materials, 2021
The discovery and realization of topological insulators, a phase of matter which hosts metallic boundary states when the d-dimension insulating bulk is confined to (d − 1)-dimensions, led to several potential applications.
Marcio Costa, Gabriel R. Schleder, Carlos Mera Acosta, Antonio C. M. Padilha, Frank Cerasoli, Marco Buongiorno Nardelli, Adalberto Fazzio   +6 more
doaj   +1 more source

Marginal topological properties of graphene: a comparison with topological insulators

, 2012
The electronic structures of graphene systems and topological insulators have closely-related features, such as quantized Berry phase and zero-energy edge states. The reason for these analogies is that in both systems there are two relevant orbital bands,
Alberto F Morpurgo, Delplace P Ullmo D Montambaux G, Ivar Martin, Jian Li, Markus Büttiker, Martin I, Volovik G   +6 more
core   +2 more sources

Chiral Ladders and the Edges of Chern Insulators

, 2013
The realization and detection of topological phases with ultracold atomic gases is at the frontier of current theoretical and experimental research.
Hügel, Dario, Paredes, Belén
core   +1 more source

A new class of (2 + 1)-dimensional topological superconductors with topological classification

New Journal of Physics, 2013
The classification of topological states of matter depends on spatial dimension and symmetry class. For non-interacting topological insulators and superconductors, the topological classification is obtained systematically and non-trivial topological ...
Xiao-Liang Qi
doaj   +1 more source

Broadband acoustic pseudospin topological states based on the reverse spin-orbit coupling in generalized insulators

Frontiers in Materials
Acoustic topological insulators have the excellent characteristic of the pseudospin-dependent one-way transmission of sound edge states immune to backscattering.
Chongrui Liu, Yibing Lu, Zhenxin He, Wenliang Guan, Zhen Huang   +4 more
doaj   +1 more source

Atomic-resolution analytical scanning transmission electron microscopy of topological insulators with a layered tetradymite structure

APL Materials, 2020
The recent discovery of topological insulators has uncovered exciting new quantum materials with potential applications in the emergent fields of topological spintronics and topological quantum computation.
Danielle Reifsnyder Hickey, K. Andre Mkhoyan   +1 more
doaj   +1 more source

PT Symmetric Floquet Topological Phase

, 2015
In this paper, we study the existence of Floquet topological insulators for PT symmetric non-Hermitian Hamiltonians. We consider an array of waveguide in 1D with periodically changing non-Hermitian potential and predict the existence of Floquet ...
Yuce, C.
core   +1 more source