Enhanced Charge Fluctuations Due to Competitions between Intersite and Kondo–Yosida Singlet Formations in Heavy-Fermion Systems
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概要
- 論文の詳細を見る
We investigate f-electron charge susceptibility in a two-impurity Anderson model on the basis of Wilson's numerical renormalization group method. The f-electron charge susceptibility diverges logarithmically at the critical point of this model when conduction-electron bands exhibit particle–hole symmetry. Although the critical point disappears without the particle–hole symmetry, the f-electron charge fluctuation is much more enhanced near the crossover regime between the Kondo–Yosida singlet and intersite spin-singlet states than that in the single-impurity case. This result shows that charge fluctuations are enhanced owing to the competition between intersite and Kondo–Yosida spin singlets. A possible scenario for the enhanced residual resistivity near the region where the Kondo temperature becomes comparable with the Néel temperatures under pressure in some heavy-fermion compounds is proposed.
- Physical Society of Japanの論文
- 2010-07-15
著者
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Miyake Kazumasa
Division Of Endocrine Surgery Kawasaki Medical School.
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Hattori Kazumasa
Institute For Solid State Physics University Of Tokyo
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Hattori Kazumasa
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Miyake Kazumasa
Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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