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Fermi surfaces in Kondo insulators

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Liu, Hsu, Hartstein, Máté, Wallace, Gregory J, Davies, Alexander J, Ciomaga Hatnean, Monica, Johannes, Michelle D, Shitsevalova, Natalya, Balakrishnan, Geetha and Sebastian, Suchitra E (2018) Fermi surfaces in Kondo insulators. Journal of Physics: Condensed Matter, 30 (16). 16LT01. doi:10.1088/1361-648X/aaa522

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Official URL: http://dx.doi.org/10.1088/1361-648X/aaa522

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Abstract

We report magnetic quantum oscillations measured using torque magnetisation in the Kondo insulator YbB12 and discuss the potential origin of the underlying Fermi surface. Observed quantum oscillations as well as complementary quantities such as a finite linear specific heat capacity in YbB12 exhibit similarities with the Kondo insulator SmB6, yet also crucial differences. Small heavy Fermi sections are observed in YbB12 with similarities to the neighbouring heavy fermion semimetallic Fermi surface, in contrast to large light Fermi surface sections in SmB6 which are more similar to the conduction electron Fermi surface. A rich spectrum of theoretical models is suggested to explain the origin across different Kondo insulating families of a bulk Fermi surface potentially from novel itinerant quasiparticles that couple to magnetic fields, yet do not couple to weak DC electric fields.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Fermi surfaces, Kondo effect, Ytterbium, Electric insulators and insulation, Metals -- Magnetic properties
Journal or Publication Title: Journal of Physics: Condensed Matter
Publisher: Institute of Physics Publishing
ISSN: 0953-8984
Official Date: 25 April 2018
Dates:
DateEvent
25 April 2018Published
28 March 2018Available
4 January 2018Accepted
8 December 2017Submitted
Volume: 30
Number: 16
Article Number: 16LT01
DOI: 10.1088/1361-648X/aaa522
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: Institute of Physics Publishing
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
Philip Leverhulme PrizeLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
Winton Programme for the Physics of SustainabilityUniversity of Cambridgehttp://dx.doi.org/10.13039/501100000735
EP/M000524/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
FP/2007-2013Seventh Framework Programmehttp://dx.doi.org/10.13039/100011102
Grant Agreement No. 337425FP7 Ideas: European Research Councilhttp://dx.doi.org/10.13039/100011199
EP/M028771/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
Basic Research ProgramOffice of Naval Researchhttp://dx.doi.org/10.13039/100000006

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