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Intrinsic bulk quantum oscillations in a bulk unconventional insulator SmB6

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Hartstein, Máté, Liu, Hsu, Hsu, Yu-Te, Tan, Beng S., Ciomaga Hatnean, Monica, Balakrishnan, Geetha and Sebastian, Suchitra E. (2020) Intrinsic bulk quantum oscillations in a bulk unconventional insulator SmB6. iScience, 23 (11). 101632. doi:10.1016/j.isci.2020.101632

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Official URL: http://dx.doi.org/10.1016/j.isci.2020.101632

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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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Quantum theory , Oscillations, Fermi surfaces , Samarium
Journal or Publication Title: iScience
Publisher: Cell Press
ISSN: 2589-0042
Official Date: 20 November 2020
Dates:
DateEvent
20 November 2020Published
1 October 2020Available
1 October 2020Accepted
Volume: 23
Number: 11
Article Number: 101632
DOI: 10.1016/j.isci.2020.101632
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: EPSRC
Grant number: EP/T005963/1
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDCavendish Laboratory (Cambridge, England)http://viaf.org/viaf/152277697
EP/R513180/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/M506485/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/P024947/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDMinistry of Educationhttp://dx.doi.org/10.13039/501100002701
337425 Seventh Framework Programmehttp://dx.doi.org/10.13039/100011102
772891Seventh Framework Programmehttp://dx.doi.org/10.13039/100011102
EP/M000524/[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
DMR-1157490National Science Foundationhttp://dx.doi.org/10.13039/501100008982
EP/T005963/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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