Ion pairs and spontaneous break of symmetry in the valence-fluctuating compound YbB12
Physical Review B - Condensed Matter and Materials Physics 68 巻 1 号
014425-1-014425-7 頁
2003-07-24 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Ion pairs and spontaneous break of symmetry in the valence-fluctuating compound YbB12
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| 作成者 |
Altshuler Tatiana S.
Goryunov Yu.V.
Bresler Michael S.
Iga Fumitoshi
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| 収録物名 |
Physical Review B - Condensed Matter and Materials Physics
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| 巻 | 68 |
| 号 | 1 |
| 開始ページ | 014425-1 |
| 終了ページ | 014425-7 |
| 抄録 |
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.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2003-07-24 |
| 権利情報 |
Copyright (c) 2003 American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0163-1829
[DOI] 10.1103/PhysRevB.68.014425
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.68.014425
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