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Title: Unconventional Fermi surface in an insulating state

Abstract

Insulators occur in more than one guise; a recent finding was a class of topological insulators, which host a conducting surface juxtaposed with an insulating bulk. Here, we report the observation of an unusual insulating state with an electrically insulating bulk that simultaneously yields bulk quantum oscillations with characteristics of an unconventional Fermi liquid. We present quantum oscillation measurements of magnetic torque in high-purity single crystals of the Kondo insulator SmB 6, which reveal quantum oscillation frequencies characteristic of a large three-dimensional conduction electron Fermi surface similar to the metallic rare earth hexaborides such as PrB 6 and LaB 6. As a result, the quantum oscillation amplitude strongly increases at low temperatures, appearing strikingly at variance with conventional metallic behavior.

Authors:
 [1];  [2];  [2];  [3];  [4];  [1];  [2];  [2];  [2];  [5];  [3];  [3];  [3];  [2];  [4];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Cambridge Univ., Cambridge (United Kingdom)
  3. National High Magnetic Field Lab., Tallahassee, FL (United States)
  4. Univ. of Warwick, Coventry (United Kingdom)
  5. Center for Computational Materials Science, Washington, DC (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1355814
Alternate Identifier(s):
OSTI ID: 1186042
Report Number(s):
LA-UR-15-24709
Journal ID: ISSN 0036-8075
Grant/Contract Number:  
AC52-06NA25396; SC0002613
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 349; Journal Issue: 6245; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science

Citation Formats

Harrison, Neil, Tan, B. S., Hsu, Y. -T., Zeng, B., Hatnean, M. Ciomaga, Zhu, Z., Hartstein, M., Kiourlappou, M., Srivastava, A., Johannes, M. D., Murphy, T. P., Park, J. -H., Balicas, L., Lonzarich, G. G., Balakrishnan, G., and Sebastian, Suchitra E. Unconventional Fermi surface in an insulating state. United States: N. p., 2015. Web. doi:10.1126/science.aaa7974.
Harrison, Neil, Tan, B. S., Hsu, Y. -T., Zeng, B., Hatnean, M. Ciomaga, Zhu, Z., Hartstein, M., Kiourlappou, M., Srivastava, A., Johannes, M. D., Murphy, T. P., Park, J. -H., Balicas, L., Lonzarich, G. G., Balakrishnan, G., & Sebastian, Suchitra E. Unconventional Fermi surface in an insulating state. United States. doi:10.1126/science.aaa7974.
Harrison, Neil, Tan, B. S., Hsu, Y. -T., Zeng, B., Hatnean, M. Ciomaga, Zhu, Z., Hartstein, M., Kiourlappou, M., Srivastava, A., Johannes, M. D., Murphy, T. P., Park, J. -H., Balicas, L., Lonzarich, G. G., Balakrishnan, G., and Sebastian, Suchitra E. Fri . "Unconventional Fermi surface in an insulating state". United States. doi:10.1126/science.aaa7974.
@article{osti_1355814,
title = {Unconventional Fermi surface in an insulating state},
author = {Harrison, Neil and Tan, B. S. and Hsu, Y. -T. and Zeng, B. and Hatnean, M. Ciomaga and Zhu, Z. and Hartstein, M. and Kiourlappou, M. and Srivastava, A. and Johannes, M. D. and Murphy, T. P. and Park, J. -H. and Balicas, L. and Lonzarich, G. G. and Balakrishnan, G. and Sebastian, Suchitra E.},
abstractNote = {Insulators occur in more than one guise; a recent finding was a class of topological insulators, which host a conducting surface juxtaposed with an insulating bulk. Here, we report the observation of an unusual insulating state with an electrically insulating bulk that simultaneously yields bulk quantum oscillations with characteristics of an unconventional Fermi liquid. We present quantum oscillation measurements of magnetic torque in high-purity single crystals of the Kondo insulator SmB6, which reveal quantum oscillation frequencies characteristic of a large three-dimensional conduction electron Fermi surface similar to the metallic rare earth hexaborides such as PrB6 and LaB6. As a result, the quantum oscillation amplitude strongly increases at low temperatures, appearing strikingly at variance with conventional metallic behavior.},
doi = {10.1126/science.aaa7974},
journal = {Science},
number = 6245,
volume = 349,
place = {United States},
year = {2015},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aaa7974

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Cited by: 67 works
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Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996

  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
  • DOI: 10.1103/PhysRevLett.77.3865