Electronic structure and open-orbit Fermi surface topology in isostructural semimetals NbAs and WAs with extremely large magnetoresistance
arXiv:2203.11848 · doi:10.1063/5.0087141
Abstract
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 of the experimental band structures. Here, using angle-resolved photoemission spectroscopy, we map out the three-dimensional electronic structure of NbAs. The open-orbit topology contributes to a non-negligible part of the Fermi surfaces (FSs), like that of the isostructural compound MoAs, where the open FS is proposed to likely explain the origin of XMR. We further demonstrate the observation of open characters in the overall FSs of WAs, which is also a XMR semimetal with the same space group of 12/1 as family and MoAs. Our results suggest that the open-orbit FS topology may be a shared feature between XMR materials with the space group of 12/1, and thus could possibly play a role in determining the corresponding XMR effect together with the electron-hole compensation.
arXiv comment7 pages, 4 figures, Editor's pick
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