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Title: Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6

Abstract

The finding of bulk quantum oscillations in the Kondo insulator SmB6 proved a considerable surprise. Subsequent measurements of bulk quantum oscillations in other correlated insulators including YbB12 lent support to our discovery of a class of bulk unconventional insulators that host bulk quantum oscillations. Here we perform a series of experiments to examine evidence for the intrinsic character of bulk quantum oscillations in floating zone-grown single crystals of SmB6 that have been the subject of our quantum oscillation studies. We present results of thermodynamic, transport, and composition analysis experiments on pristine floating zone-grown single crystals of SmB6 and compare quantum oscillations with metallic LaB6 and elemental aluminum. These results establish the intrinsic origin of quantum oscillations from the insulating bulk of floating zone-grown SmB6. The similarity of the Fermi surface in insulating SmB6 with the conduction-electron Fermi surface in metallic hexaborides is at the heart of a theoretical mystery.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [2]; ORCiD logo [1]
  1. Univ. of Cambridge (United Kingdom). Cavendish Lab.
  2. Univ. of Warwick, Coventry (United Kingdom)
Publication Date:
Research Org.:
Florida State University, Tallahassee, FL (United States). National High Magnetic Field Laboratory (MagLab)
Sponsoring Org.:
USDOE; Engineering and Physical Sciences Research Council (EPSRC); Taiwanese Ministry of Education; European Research Council (ERC); National Science Foundation (NSF)
OSTI Identifier:
1816591
Grant/Contract Number:  
EP/R513180/1; EP/M506485/1; EP/P024947/1; 337425; 772891; EP/M000524/1; DMR-1157490; EP/T005963/1
Resource Type:
Accepted Manuscript
Journal Name:
iScience
Additional Journal Information:
Journal Volume: 23; Journal Issue: 11; Journal ID: ISSN 2589-0042
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; condensed matter physics; quantum solids; strongly correlated electron systems

Citation Formats

Hartstein, Máté, Liu, Hsu, Hsu, Yu-Te, Tan, Beng S., Ciomaga Hatnean, Monica, Balakrishnan, Geetha, and Sebastian, Suchitra E. Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6. United States: N. p., 2020. Web. doi:10.1016/j.isci.2020.101632.
Hartstein, Máté, Liu, Hsu, Hsu, Yu-Te, Tan, Beng S., Ciomaga Hatnean, Monica, Balakrishnan, Geetha, & Sebastian, Suchitra E. Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6. United States. https://doi.org/10.1016/j.isci.2020.101632
Hartstein, Máté, Liu, Hsu, Hsu, Yu-Te, Tan, Beng S., Ciomaga Hatnean, Monica, Balakrishnan, Geetha, and Sebastian, Suchitra E. Thu . "Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6". United States. https://doi.org/10.1016/j.isci.2020.101632. https://www.osti.gov/servlets/purl/1816591.
@article{osti_1816591,
title = {Intrinsic Bulk Quantum Oscillations in a Bulk Unconventional Insulator SmB6},
author = {Hartstein, Máté and Liu, Hsu and Hsu, Yu-Te and Tan, Beng S. and Ciomaga Hatnean, Monica and Balakrishnan, Geetha and Sebastian, Suchitra E.},
abstractNote = {The finding of bulk quantum oscillations in the Kondo insulator SmB6 proved a considerable surprise. Subsequent measurements of bulk quantum oscillations in other correlated insulators including YbB12 lent support to our discovery of a class of bulk unconventional insulators that host bulk quantum oscillations. Here we perform a series of experiments to examine evidence for the intrinsic character of bulk quantum oscillations in floating zone-grown single crystals of SmB6 that have been the subject of our quantum oscillation studies. We present results of thermodynamic, transport, and composition analysis experiments on pristine floating zone-grown single crystals of SmB6 and compare quantum oscillations with metallic LaB6 and elemental aluminum. These results establish the intrinsic origin of quantum oscillations from the insulating bulk of floating zone-grown SmB6. The similarity of the Fermi surface in insulating SmB6 with the conduction-electron Fermi surface in metallic hexaborides is at the heart of a theoretical mystery.},
doi = {10.1016/j.isci.2020.101632},
journal = {iScience},
number = 11,
volume = 23,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 2020},
month = {Thu Oct 01 00:00:00 EDT 2020}
}

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