An effect of Sm vacancies on the hybridization gap in topological Kondo insulator candidate SmB6
Journal Article
·
· Physica. B, Condensed Matter
- Johns Hopkins Univ., Baltimore, MD (United States)
- Univ. of California, Irvine, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of California, Irvine, CA (United States)
A necessary element for the predicted topological state in Kondo insulator SmB6 is the hybridization gap which opens in this compound at low temperatures. Here, in this work, we present a comparative study of the in-gap density of states due to Sm vacancies by Raman scattering spectroscopy and heat capacity for samples where the number of Sm vacancies is equal to or below 1%. We demonstrate that hybridization gap is very sensitive to the presence of Sm vacancies. Lastly, at the amount of vacancies above 1% the gap fills in with impurity states and low temperature heat capacity is enhanced.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC52-06NA25396; FG02-08ER46544
- OSTI ID:
- 1416316
- Report Number(s):
- LA-UR-17-30687; TRN: US1800918
- Journal Information:
- Physica. B, Condensed Matter, Vol. 536; ISSN 0921-4526
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 3 works
Citation information provided by
Web of Science
Web of Science
Fermi surface in the absence of a Fermi liquid in the Kondo insulator SmB6
|
journal | October 2017 |
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