Non-magnetic element substitution effect in Kondo insulator YbB12 and exotic surface effect in this alloy system
oleh: F. Iga, K. Yokomichi, W. Matsuhra, H. Nakayama, A. Kondo, K. Kindo, H. Yoshizawa
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2018-10-01 |
Deskripsi
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.