1.
Proc Natl Acad Sci U S A
; 116(26): 12638-12641, 2019 06 25.
Article
in English
| MEDLINE
| ID: mdl-31182612
ABSTRACT
The inverted resistance method was used in this study to extend the bulk resistivity of [Formula: see text] to a regime where the surface conduction overwhelms the bulk. Remarkably, regardless of the large off-stoichiometric growth conditions (inducing disorder by samarium vacancies, boron interstitials, etc.), the bulk resistivity shows an intrinsic thermally activated behavior that changes â¼7-10 orders of magnitude, suggesting that [Formula: see text] is an ideal insulator that is immune to disorder.