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Divalent ion substitution effect on Yb-site in Kondo insulator YbB12

Authors :
W. Matsuhra
K. Yokomichi
W. Hirano
S. Kikuchi
N. Uematsu
H. Nakayama
A. Kondo
K. Kindo
F. Iga
Source :
AIP Advances, Vol 8, Iss 10, Pp 101329-101329-3 (2018)
Publication Year :
2018
Publisher :
AIP Publishing LLC, 2018.

Abstract

YbB12 has been investigated energetically as a typical Kondo insulator. To study detailed formation mechanism of Kondo energy gap, we have investigated transport and magnetic properties of Yb1-xR3+xB12 (R3+ = non-magnetic trivalent ions). Recently, we have recently succeeded in substitution of Ca2+ for Yb site in YbB12 by high-pressure synthesis. In Ca- and Lu-substituted alloys both of magnetic susceptibility and specific heat C/T at low temperatures, remarkably show larger increase than those of powdered YbB12. These increases are due to giant increase of density of state in an in-gap state.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
8
Issue :
10
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.20ae1071e7d245b999098835bc233775
Document Type :
article
Full Text :
https://doi.org/10.1063/1.5043111