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Title: Topological surface states on the nonpolar (110) and (111) surfaces of SmB6

Abstract

In order to clarify the controversial issue of the topological nature in a mixed-valent Kondo system, SmB6, we have explored the surface states on the nonpolar (110) surface of SmB6, employing both angle-resolved photoemission spectroscopy (ARPES) experiment and ab initio density-functional theory (DFT) band calculations. Based on ARPES spectroscopic fingerprints and the DFT surface band structures, we ascribe the observed spectral weights at $$\bar{X}$$ and $$\bar{Y}$$ on the (110) surface Brillouin zone to topological surface states (TSSs) of “topological insulator (TI)” nature and of “topological crystalline insulator (TCI)” nature, respectively. With varying the chemical potential, the double Dirac cones of the TCI nature exhibit a Lifshitz transition of Fermi surfaces with intriguing spin textures. Further, we have also examined the TSSs on the nearly nonpolar (111) surface of SmB6 in connection with a recently reported ARPES result and proposed a way to probe the Dirac points that are buried in the bulk-projected bands.

Authors:
 [1];  [2];  [1]; ORCiD logo [3];  [4];  [5];  [6]; ORCiD logo [1]
+ Show Author Affiliations
  1. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)
  2. Rutgers Univ., Piscataway, NJ (United States)
  3. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)
  4. Rutgers Univ., Piscataway, NJ (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. The Catholic University of Korea, Bucheon (Korea, Republic of)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); National Research Foundation of Korea (NRF); Korea Institute of Science and Technology
OSTI Identifier:
1822866
Grant/Contract Number:  
AC02-05CH11231; DMR-1733071; 2016R1D1A1B02008461; 2017R1A2B4005175; 2018R1A6A3A01013431; 2019R1A2C1004929; 2016K1A4A4A01922028; KSC-2018-CRE-0064
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 103; Journal Issue: 12; 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; symmetry protected topological states; topological insulators; Kondo insulators; topological materials; first-principles calculations

Citation Formats

Ryu, Dong-Choon, Kang, Chang-Jong, Kim, Junwon, Kim, Kyoo, Kotliar, G., Kang, J. -S., Denlinger, J. D., and Min, B. I. Topological surface states on the nonpolar (110) and (111) surfaces of SmB6. United States: N. p., 2021. Web. doi:10.1103/physrevb.103.125101.
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Ryu, Dong-Choon, Kang, Chang-Jong, Kim, Junwon, Kim, Kyoo, Kotliar, G., Kang, J. -S., Denlinger, J. D., & Min, B. I. Topological surface states on the nonpolar (110) and (111) surfaces of SmB6. United States. https://doi.org/10.1103/physrevb.103.125101
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Ryu, Dong-Choon, Kang, Chang-Jong, Kim, Junwon, Kim, Kyoo, Kotliar, G., Kang, J. -S., Denlinger, J. D., and Min, B. I. Mon . "Topological surface states on the nonpolar (110) and (111) surfaces of SmB6". United States. https://doi.org/10.1103/physrevb.103.125101. https://www.osti.gov/servlets/purl/1822866.
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@article{osti_1822866,
title = {Topological surface states on the nonpolar (110) and (111) surfaces of SmB6},
author = {Ryu, Dong-Choon and Kang, Chang-Jong and Kim, Junwon and Kim, Kyoo and Kotliar, G. and Kang, J. -S. and Denlinger, J. D. and Min, B. I.},
abstractNote = {In order to clarify the controversial issue of the topological nature in a mixed-valent Kondo system, SmB6, we have explored the surface states on the nonpolar (110) surface of SmB6, employing both angle-resolved photoemission spectroscopy (ARPES) experiment and ab initio density-functional theory (DFT) band calculations. Based on ARPES spectroscopic fingerprints and the DFT surface band structures, we ascribe the observed spectral weights at $\bar{X}$ and $\bar{Y}$ on the (110) surface Brillouin zone to topological surface states (TSSs) of “topological insulator (TI)” nature and of “topological crystalline insulator (TCI)” nature, respectively. With varying the chemical potential, the double Dirac cones of the TCI nature exhibit a Lifshitz transition of Fermi surfaces with intriguing spin textures. Further, we have also examined the TSSs on the nearly nonpolar (111) surface of SmB6 in connection with a recently reported ARPES result and proposed a way to probe the Dirac points that are buried in the bulk-projected bands.},
doi = {10.1103/physrevb.103.125101},
journal = {Physical Review B},
number = 12,
volume = 103,
place = {United States},
year = {Mon Mar 01 00:00:00 EST 2021},
month = {Mon Mar 01 00:00:00 EST 2021}
}
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