Prediction of Spin Polarized Fermi Arcs in Quasiparticle Interference of CeBi
| Autor: | Huang, Zhao, Lane, Christopher A., Cao, Chao, Zhi, Guo-Xiang, Liu, Yu, Matt, Christian, Kuthanazhi, Brinda, Canfield, Paul C., Yarotski, Dmitry, Taylor, A. J., Zhu, Jian-Xin |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 102, 235167 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.102.235167 |
| Popis: | 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 $(0, 0, k_z)$ at $15$ meV} above and $100$ meV below the Fermi level. Two corresponding Fermi arcs are obtained on surfaces of mirror-symmetric (010)-oriented slabs at $E=15$ meV 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. 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. Comment: 9 pages with 9 embedded figures. Supplemental material shortened |
| Databáze: | arXiv |
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