Prediction of spin polarized Fermi arcs in quasiparticle interference in CeBi
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Hangzhou Normal Univ. (China)
- Zhejiang Univ., Hangzhou (China)
- Harvard Univ., Cambridge, MA (United States)
- Ames Lab., and Iowa State Univ., Ames, IA (United States)
We predict that CeBi in the ferromagnetic state is a Weyl semimetal. Our calculations within density functional theory show the existence of two pairs of Weyl nodes on the momentum path (0,0,kz) at 15meV above and 100meV below the Fermi level. Two corresponding Fermi arcs are obtained on surfaces of mirror-symmetric (010)-oriented slabs at E=15meV and both arcs are interrupted into three segments due to hybridization with a set of trivial surface bands. By studying the spin texture of surface states, we find the two Fermi arcs are strongly spin polarized but in opposite directions, which can be detected by spin-polarized ARPES measurements. Here, our theoretical study of quasiparticle interference (QPI) for a nonmagnetic impurity at the Bi site also reveals several features related to the Fermi arcs. Specifically, we predict that the spin polarization of the Fermi arcs leads to a bifurcation-shaped feature only in the spin-dependent QPI spectrum, serving as a fingerprint of the Weyl nodes.
- Research Organization:
- Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT); Energy Frontier Research Centers (EFRC) (United States). Center for the Advancement of Topological Semimetals (CATS); Ames Lab., Ames, IA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss National Science Foundation (SNF)
- Grant/Contract Number:
- 89233218CNA000001; AC02-07CH11358
- OSTI ID:
- 1760613
- Alternate ID(s):
- OSTI ID: 1769021
- Report Number(s):
- LA-UR-20-26486; IS-J-10,431; TRN: US2206034
- Journal Information:
- Physical Review B, Vol. 102, Issue 23; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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