YbRh_2Si_2 : Quantum Tricritical Behavior in Itinerant Electron Systems(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We propose that the proximity of the first-order transition manifested by the quantum tricritical point (QTCP) explains non-Fermi-liquid properties of YbRh_2Si_2. Here, at the QTCP, a continuous phase transition changes into first order at zero temperature. The non-Fermi-liquid behaviors of YbRh_2Si_2 are veiled in several prominent mysteries; diverging ferromagnetic susceptibility at the antiferromagnetic transition and enhancement of magnetization as well as specific heat. These puzzles are solved by an unconventional criticality derived from our spin fluctuation theory for the QTCP; especially, diverging ferromagnetic susceptibility is quantitatively reproduced.
- 社団法人日本物理学会の論文
- 2008-09-15
著者
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Imada Masatoshi
Department Of Applied Physics University Of Tokyo
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MISAWA Takahiro
Department of Applied Physics, University of Tokyo
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YAMAJI Youhei
Department of Applied Physics, University of Tokyo
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Yamaji Youhei
Department Of Applied Physics University Of Tokyo
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Misawa Takahiro
Department Of Applied Physics University Of Tokyo
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- YbRh_2Si_2 : Quantum Tricritical Behavior in Itinerant Electron Systems(Condensed matter: electronic structure and electrical, magnetic, and optical properties)