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ID 18724
本文ファイル
著者
Altshuler, Tatiana S.
Goryunov, Yu.V.
Bresler, Michael S.
Iga, Fumitoshi
抄録(英)
Electron spin resonance (ESR) from Yb3+ ions in a single crystal of fluctuating valence compound YbB12 was studied. We have observed two main lines symmetrically displaced from a g value of 2.55 and exhibiting modulation with 5% anisotropy, when the magnetic field was rotated in the (110) plane from the cubic axis to the [110] direction. Experimental results are explained by an existence of Yb-Yb pairs which are coupled by isotropic exchange but interact also with the other pairs by dipole and exchange coupling. A strong temperature dependence of the amplitude of the ESR signals is found and interpreted as a result of capture of electrons by Yb3+ ions from electron traps with a binding energy of 18 K. The occurrence of a slight anisotropy in a cubic semiconductor may be the result of a spontaneous break of symmetry specific for the ground state of a Kondo dielectric.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
68巻
1号
開始ページ
014425-1
終了ページ
014425-7
出版年月日
2003-07-24
出版者
American Physical Society
ISSN
0163-1829
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2003 American Physical Society.
関連情報URL
部局名
先端物質科学研究科