Low-temperature conducting state in two candidate topological Kondo insulators: and
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- 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
Web of Science
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 |
Similar Records
Bulk Rotational Symmetry Breaking in Kondo Insulator
Surface state reconstruction in ion-damaged