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Title: Low-temperature conducting state in two candidate topological Kondo insulators: SmB 6 and Ce 3 Bi 4 Pt 3

Journal Article · · Physical Review B
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of California, Irvine, CA (United States)

We have investigated the low temperature conducting state of two Kondo insulators, SmB6 and Ce3Bi4Pt3, which have been theoretically predicted to host topological surface states. Through comparison of the speci c heat of as-grown and powdered single crystals of SmB6, we show that the residual term that is linear in temperature is not dominated by any surface state contribution, but rather is a bulk property. In Ce3Bi4Pt3, we find that the Hall coefficient is independent of sample thickness, which indicates that conduction at low temperatures is dominated by the bulk of the sample, and not by a surface state. The low temperature resistivity of Ce3Bi4Pt3 is found to monotonically decrease with low concentrations of disorder introduced through ion-irradiation. This is in contrast to SmB6, which is again indicative of the contrasting origins of the low temperature conduction. In SmB6, we also show that the effect of low concentrations of irradiation damage of the surface with Fe+ ions is qualitatively consistent with damage with non-magnetic ions.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1414091
Alternate ID(s):
OSTI ID: 1261700
Report Number(s):
LA-UR-16-22744; PRBMDO; TRN: US1800626
Journal Information:
Physical Review B, Vol. 94, Issue 3; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (4)

Mixed-valence insulators with neutral Fermi surfaces journal May 2018
Magnetic field-tuned Fermi liquid in a Kondo insulator journal December 2019
Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling text January 2016
Quantum Oscillation from In-gap States and non-Hermitian Landau Level Problem text January 2018

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