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Electronic structure and open-orbit Fermi surface topology in isostructural semimetals NbAs and WAs with extremely large magnetoresistance
Rui Lou, Yiyan Wang, Lingxiao Zhao +11
In transition-metal dipnictides ( = Ta, Nb; = P, As, Sb), the origin of extremely large magnetoresistance (XMR) is yet to be studied by the direct visualization o…
Giant Chern number of a Weyl nodal surface without upper limit
Junzhang Ma, S. -N. Zhang, J. P. Song +15
Weyl nodes can be classified into zero-dimensional (0D) Weyl points (WPs), 1D Weyl nodal lines (WNL) and 2D Weyl nodal surfaces (WNS), which possess finite Chern numbers. Up to dat…
Angle-resolved photoemission spectroscopy and its application to topological materials
Baiqing Lv, Tian Qian, Hong Ding
Angle-resolved photoemission spectroscopy (ARPES), an experimental technique based on the photoelectric effect, is arguably the most powerful method for probing the electronic stru…
Discovery of Ĉ rotation anomaly in topological crystalline insulator SrPb
Wenhui Fan, Simin Nie, Cuixiang Wang +12
Topological crystalline insulators (TCIs) are insulating electronic states with nontrivial topology protected by crystalline symmetries. Recently, theory has proposed new classes o…
Time-reversal symmetry breaking driven topological phase transition in EuB
Shun-Ye Gao, Sheng Xu, Hang Li +16
The interplay between time-reversal symmetry (TRS) and band topology plays a crucial role in topological states of quantum matter. In time-reversal-invariant (TRI) systems, the inv…
Quasiparticle Interference Evidence of the Topological Fermi Arc States in Chiral Fermionic Semimetal CoSi
Qian-Qian Yuan, Liqin Zhou, Zhi-Cheng Rao +13
Chiral fermions in solid state feature "Fermi arc" states, connecting the surface projections of the bulk chiral nodes. The surface Fermi arc is a signature of nontrivial bulk topo…