Results 51 to 60 of about 45,930 (178)

Complete phase diagram and topological properties of interacting bosons in one-dimensional superlattices [PDF]

, 2015
The interacting bosons in one-dimensional inversion-symmetric superlattices are investigated from the topological aspect. The complete phase diagram is obtained by an atomic-limit analysis and quantum Monte Carlo simulations and comprises three kinds of ...
Chen, Shu, Guo, Huaiming, Li, Tianhe, Shen, Shun-Qing   +3 more
core   +2 more sources

Topological Crystalline Materials of J=3/2 Electrons: Antiperovskites, Dirac Points, and High Winding Topological Superconductivity

Physical Review X, 2018
We present a theory of the high-spin generalization of topological insulators and their doped superconducting states. The higher-spin topological insulators involve a pair of J=3/2 bands with opposite parity and are characterized by their band inversion.
Takuto Kawakami, Tetsuya Okamura, Shingo Kobayashi, Masatoshi Sato   +3 more
doaj   +1 more source

Topological magnon insulator in insulating ferromagnet [PDF]

Physical Review B, 2013
In the ferromagnetic insulator with Dzyaloshinskii-Moriya interaction, we theoretically predict and numerically verify a topological magnon insulator, where the charge-free magnon is topologically protected to transport along the edge while it is insulating in the bulk.
Zhang, L., Ren, J., Wang, J.-S., Li, B.
openaire   +2 more sources

The quantum spin Hall effect and topological insulators

, 2010
In topological insulators, spin-orbit coupling and time-reversal symmetry combine to form a novel state of matter predicted to have exotic physical properties.Comment: 7 pages, 5 figures, an introduction of the quantum spin Hall effect and topological ...
Qi, Xiao-Liang, Zhang, Shou-Cheng
core   +1 more source

Spectral Asymmetry Induces a Re‐Entrant Quantum Hall Effect in a Topological Insulator

Advanced Science
The band inversion of topological materials in three spatial dimensions is intimately connected to the parity anomaly of 2D massless Dirac fermions, known from quantum field theory.
Li‐Xian Wang, Wouter Beugeling, Fabian Schmitt, Lukas Lunczer, Julian‐Benedikt Mayer, Hartmut Buhmann, Ewelina M. Hankiewicz, Laurens W. Molenkamp   +7 more
doaj   +1 more source

Topological insulators in filled skutterudites

, 2011
We propose new topological insulators in cerium filled skutterudite (FS) compounds based on ab initio calculations. We find that two compounds CeOs4As12 and CeOs4Sb12 are zero gap materials with band inversion between Os-d and Ce-f orbitals, which are ...
Binghai Yan, Claudia Felser, J. P. Fleurial, Lukas Müchler, M. B. Maple, Shou-Cheng Zhang, Xiao-Liang Qi   +6 more
core   +1 more source

Topological insulators and superconductors [PDF]

, 2010
Topological insulators are new states of quantum matter which can not be adiabatically connected to conventional insulators and semiconductors. They are characterized by a full insulating gap in the bulk and gapless edge or surface states which are ...
Anderson, P. W., Dubrovin, B. A., Giamarchi, T., Landau, L. D., Landau, L. D., Nakahara, M., Shou-Cheng Zhang, Thouless, D. J., Volkov, B. A., Vollhardt, D., Volovik, G. E., Volovik, G. E., Volovik, G. E., Volovik, G. E., Winkler, R., Xiao-Liang Qi   +15 more
core   +3 more sources

Highly efficient broadband THz mixing and upconversion with Dirac materials

Communications Physics
The use of the THz frequency domain in future network generations offers an unparalleled level of capacity, which can enhance innovative applications in wireless communication, analytics, and imaging.
Tatiana A. Uaman Svetikova, Igor Ilyakov, Alexey Ponomaryov, Thales V. A. G. de Oliveira, Christian Berger, Lena Fürst, Florian Bayer, Jan-Christoph Deinert, Gulloo Lal Prajapati, Atiqa Arshad, Elena G. Novik, Alexej Pashkin, Manfred Helm, Stephan Winnerl, Hartmut Buhmann, Laurens W. Molenkamp, Tobias Kiessling, Sergey Kovalev, Georgy V. Astakhov   +18 more
doaj   +1 more source

Higher‐Order Topological States in Surface‐Wave Photonic Crystals

Advanced Science, 2020
Photonic topological states have revolutionized the understanding of the propagation and scattering of light. The recent discovery of higher‐order photonic topological insulators opens an emergent horizon for 0D topological corner states.
Li Zhang, Yihao Yang, Zhi‐Kang Lin, Pengfei Qin, Qiaolu Chen, Fei Gao, Erping Li, Jian‐Hua Jiang, Baile Zhang, Hongsheng Chen   +9 more
doaj   +1 more source

Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states

Nature Communications, 2016
Future spintronic devices may exploit topological insulators, bulk insulators with unique spin-momentum locked conductive surface states. Here, the authors demonstrate the detection of thermally-generated spin currents in a ferromagnetic-insulator ...
Zilong Jiang, Cui-Zu Chang, Massoud Ramezani Masir, Chi Tang, Yadong Xu, Jagadeesh S. Moodera, Allan H. MacDonald, Jing Shi   +7 more
doaj   +1 more source