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Title: Angle-resolved photoemission spectroscopy study of the Möbius Kondo insulator candidate CeRhSb

Abstract

The electronic structure of a Möbius Kondo insulator candidate of CeRhSb has been investigated by employing angle-resolved photoemission spectroscopy, density functional theory (DFT) band calculations, and dynamical mean-field theory (DMFT) band calculations. Fermi surfaces (FSs) and band structures are successfully measured for three orthogonal crystallographic directions. A sharp Ce 4f peak is observed at the Fermi level (EF), and its temperature (T) evolution agrees with that of the Ce 4f Kondo resonance. The metallic FSs are obtained for all three different (100), (010), and (001) planes. The Ce 4f FSs are described properly by the unfolded DFT calculations considering the reduced Ce-only unit cell. The T dependence of Ce 4f states as well as the dispersive coherent Ce 4f bands are described well by the DMFT calculations and reveal the anisotropic c - f hybridization. The photon energy dependence of the Fermi-edge states in CeRhSb reveals the three-dimensional character, consistent with the bulk states dispersing to EF over a larger energy scale rather than the predicted Möbius topological surface states.

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [3];  [3];  [4]; ORCiD logo [1]
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  1. Catholic Univ. of Korea, Bucheon (Korea)
  2. Pohang Univ. of Science and Technology, Pohang (Korea)
  3. Hiroshima Univ., Higashi-Hiroshima (Japan)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Research Foundation of Korea (NRF)
OSTI Identifier:
1581074
Alternate Identifier(s):
OSTI ID: 1543364
Grant/Contract Number:  
AC02-05CH11231; KSC-2017-C3-0057
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Seong, Seungho, Kim, Kyoo, Lee, Eunsook, Kang, Chang-Jong, Nam, Taesik, Min, B. I., Yoshino, Takenobu, Takabatake, T., Denlinger, J. D., and Kang, J. -S. Angle-resolved photoemission spectroscopy study of the Möbius Kondo insulator candidate CeRhSb. United States: N. p., 2019. Web. doi:10.1103/physrevb.100.035121.
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Seong, Seungho, Kim, Kyoo, Lee, Eunsook, Kang, Chang-Jong, Nam, Taesik, Min, B. I., Yoshino, Takenobu, Takabatake, T., Denlinger, J. D., & Kang, J. -S. Angle-resolved photoemission spectroscopy study of the Möbius Kondo insulator candidate CeRhSb. United States. https://doi.org/10.1103/physrevb.100.035121
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Seong, Seungho, Kim, Kyoo, Lee, Eunsook, Kang, Chang-Jong, Nam, Taesik, Min, B. I., Yoshino, Takenobu, Takabatake, T., Denlinger, J. D., and Kang, J. -S. Mon . "Angle-resolved photoemission spectroscopy study of the Möbius Kondo insulator candidate CeRhSb". United States. https://doi.org/10.1103/physrevb.100.035121. https://www.osti.gov/servlets/purl/1581074.
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@article{osti_1581074,
title = {Angle-resolved photoemission spectroscopy study of the Möbius Kondo insulator candidate CeRhSb},
author = {Seong, Seungho and Kim, Kyoo and Lee, Eunsook and Kang, Chang-Jong and Nam, Taesik and Min, B. I. and Yoshino, Takenobu and Takabatake, T. and Denlinger, J. D. and Kang, J. -S.},
abstractNote = {The electronic structure of a Möbius Kondo insulator candidate of CeRhSb has been investigated by employing angle-resolved photoemission spectroscopy, density functional theory (DFT) band calculations, and dynamical mean-field theory (DMFT) band calculations. Fermi surfaces (FSs) and band structures are successfully measured for three orthogonal crystallographic directions. A sharp Ce 4f peak is observed at the Fermi level (EF), and its temperature (T) evolution agrees with that of the Ce 4f Kondo resonance. The metallic FSs are obtained for all three different (100), (010), and (001) planes. The Ce 4f FSs are described properly by the unfolded DFT calculations considering the reduced Ce-only unit cell. The T dependence of Ce 4f states as well as the dispersive coherent Ce 4f bands are described well by the DMFT calculations and reveal the anisotropic c - f hybridization. The photon energy dependence of the Fermi-edge states in CeRhSb reveals the three-dimensional character, consistent with the bulk states dispersing to EF over a larger energy scale rather than the predicted Möbius topological surface states.},
doi = {10.1103/physrevb.100.035121},
journal = {Physical Review B},
number = 3,
volume = 100,
place = {United States},
year = {Mon Jul 22 00:00:00 EDT 2019},
month = {Mon Jul 22 00:00:00 EDT 2019}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1103/physrevb.100.035121
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Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: Crystal structure and BZ of CeRhSb. (a) The orthorhombic ϵ-TiNiSi-type structure viewed from the [100] direction, showing that the orthorhombic structure is slightly deformed from the hexagonal structure. (b) The original unit cell (black lines) versus the reduced Ce-only unit cell (the blue-colored cell), for which only Cemore » ions are considered and Rh and Sb ions are ignored. (c) The BZ’s of the orthorhombic (red), hexagonal (blue), and Ce-only (green) structures, superposed onto one another. (d) The resistivity ρ(T ) for polycrystalline CeRhSb (adapted from Ref.38).« less
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