Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8160899 | Physica B: Condensed Matter | 2018 | 14 Pages |
Abstract
A necessary element for the predicted topological state in Kondo insulator SmB6 is the hybridization gap which opens in this compound at low temperatures. 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. At the amount of vacancies above 1% Â the gap fills in with impurity states and low temperature heat capacity is enhanced.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Michael E. Valentine, Seyed Koohpayeh, W. Adam Phelan, Tyrel M. McQueen, Priscila F.S. Rosa, Zachary Fisk, Natalia Drichko,