Non-magnetic element substitution effect in Kondo insulator YbB12 and exotic surface effect in this alloy system
- Resource Type
- article
- Authors
- F. Iga; K. Yokomichi; W. Matsuhra; H. Nakayama; A. Kondo; K. Kindo; H. Yoshizawa
- Source
- AIP Advances, Vol 8, Iss 10, Pp 101335-101335-4 (2018)
- Subject
- Physics
QC1-999
- Language
- English
- ISSN
- 2158-3226
Kondo temperature TK’s for Kondo insulator alloys Yb1-xRxB12 (R = Y, Lu, Sc and Zr) show drastic variation as every x increase. It is found that YbB12 in a virtual gap-less state would have a peak at about 25 K in magnetic susceptibility χ(T) from analysis of χ(T) of all these alloys. Up-turns shown in χ(T) below 20 K grow as development of an energy gap ΔE. Those behaviors may be related to the second-gap development within the in-gap state showing metallic behaviors.