Evidence for Short-Range Antiferromagnetic Fluctuations in Kondo-Insulating YbB12

Physical Review Letters 94 巻 24 号 247204-1-247204-4 頁 2005-06-21 発行
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タイトル ( eng )
Evidence for Short-Range Antiferromagnetic Fluctuations in Kondo-Insulating YbB12
作成者
Mignot Jean-Michel
Alekseev Pavel A.
Nemkovski K.S.
Regnault Louis-Pierre
Iga Fumitoshi
収録物名
Physical Review Letters
94
24
開始ページ 247204-1
終了ページ 247204-4
抄録
The spin dynamics of mixed-valence YbB12 has been studied by inelastic neutron scattering on a high-quality single crystal. In the Kondo-insulating regime realized at low temperature, the spectra exhibit a spin-gap structure with two sharp, dispersive, in-gap excitations at hω = 14.5 and = 20meV. The lower mode is shown to be associated with short-range correlations near the antiferromagnetic wave vector q0=(1/2, 1/2, 1/2). Its properties are in overall agreement with those expected for a "spin-exciton" branch in an indirect hybridization gap semiconductor.
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2005-06-21
権利情報
Copyright (c) 2005 American Physical Society.
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] 0031-9007
[DOI] 10.1103/PhysRevLett.94.247204
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.94.247204