Mott Transition vs Multicritical Phenomenon of Superconductivity and Antiferromagnetism : Application to κ-(BEDT-TTF)_2X (Condensed Matter: Electric Structure, Electrical, Magnetic and Optical Properties)
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概要
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Interplay between Mott transition and the multicritical phenomenon of d-wave superconductivity (SC) and antiferromagnetism (AF) is studied theoretically. We describe the Mott transition, which is analogous to a liquid-gas phase transition, in terms of an Ising-type order parameter 77. We reveal possible mean-field phase diagrams produced by this interplay. Renormalization group analysis up to one-loop order gives flows of coupling constants, which in most cases lead to fluctuation-induced first-order phase transitions even when the SO(5) symmetry exists betwen the SC and AF. Behaviors of various physical quantities around the Mott critical point are predicted. Experiments on κ-(BEDT-TTF)_2X are discussed from this viewpoint.
- 社団法人日本物理学会の論文
- 2003-10-15
著者
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NAGAOSA Naoto
Department of Applied Physics, University of Tokyo
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Nagaosa Naoto
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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Nagaosa Naoto
Department Of Applied Physics University Of Tokyo:correlated Electron Research Center Aist:crest Jap
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Onoda S
Tokura Spin Superstructure Project Erato Japan Science And Technology Corporation C-o Department Of
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Onoda Shigeki
Tokura Spin Superstructure Project Erato Japan Science And Technology Corporation C/o Department Of
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