Spin-polarized imaging of strongly interacting fermions in the ferrimagnetic state of the Weyl candidate CeBi
Date
2022-02-22
Authors
Matt, Christian E.
Liu, Yu
Pirie, Harris
Drucker, Nathan C.
Jo, Na Hyun
Kuthanazhi, Brinda
Huang, Zhao
Lane, Christopher
Zhu, Jian-Xin
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Iowa State University Digital Repository, Ames IA (United States)
Abstract
CeBi has an intricate magnetic phase diagram whose fully polarized state has recently been suggested as a Weyl semimetal, though the role of f states in promoting strong interactions has remained elusive. Here we focus on the less-studied but also time-reversal symmetry-breaking ferrimagnetic phase of CeBi, where our density functional theory (DFT) calculations predict additional Weyl nodes near the Fermi level E-F. We use spin-polarized scanning tunneling microscopy and spectroscopy to image the surface ferrimagnetic order on the itinerant Bi p states, indicating their orbital hybridization with localized Ce f states. We observe suppression of this spin-polarized signature at E-F, coincident with a Fano line shape in the conductance spectra, suggesting the Bi p states partially Kondo screen the f magnetic moments, and this p - f hybridization causes strong Fermi-level band renormalization. The p-band flattening is supported by our quasiparticle interference measurements, which also show band splitting in agreement with DFT, painting a consistent picture of a strongly interacting magnetic Weyl semimetal.
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IS-J 10759
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article
Comments
This article is published as Matt, Christian E., Yu Liu, Harris Pirie, Nathan C. Drucker, Na Hyun Jo, Brinda Kuthanazhi, Zhao Huang et al. "Spin-polarized imaging of strongly interacting fermions in the ferrimagnetic state of the Weyl candidate CeBi." Physical Review B 105, no. 8 (2022): 085134.
DOI: 10.1103/PhysRevB.105.085134.
Copyright 2022 American Physical Society.
Posted with permission.
DOE Contract Number(s): 89233218CNA000001; AC02- 07CH11358; AC02-07CH11358.