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Evidence of topological insulator state in the semimetal LaBi
R. Lou, B. -B. Fu, Q. N. Xu +17
By employing angle-resolved photoemission spectroscopy combined with first-principles calculations, we performed a systematic investigation on the electronic structure of LaBi, whi…
Topologically entangled Rashba-split Shockley states on the surface of grey arsenic
Peng Zhang, J. -Z. Ma, Y. Ishida +13
We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angle-resolved photoemission spectroscopy (ARPES). In the occupied side, the pair rese…
Experimental Discovery of the First Nonsymmorphic Topological Insulator KHgSb
J. -Z. Ma, C. -J. Yi, B. Q. Lv +11
Topological insulators (TIs) host novel states of quantum matter, distinguished from trivial insulators by the presence of nontrivial conducting boundary states connecting the vale…
Discovery of Weyl semimetal state violating Lorentz invariance in MoTe2
N. Xu, Z. J. Wang, A. P. Weber +16
A new type of Weyl semimetal state, in which the energy values of Weyl nodes are not the local extrema, has been theoretically proposed recently, namely type II Weyl semimetal. Dis…
Comparative Raman study of Weyl semimetals TaAs, NbAs, TaP and NbP
H. W. Liu, P. Richard, L. X. Zhao +2
We report a comparative polarized Raman study of Weyl semimetals TaAs, NbAs, TaP and NbP. The evolution of the phonon frequencies with the sample composition allows us to determine…
Experimental evidence of large-gap two-dimensional topological insulator on the surface of ZrTe5
R. Wu, J. -Z. Ma, L. -X. Zhao +12
Two-dimensional (2D) topological insulators (TIs) with a large bulk band-gap are promising for experimental studies of the quantum spin Hall effect and for spintronic device applic…