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Department of Theoretical Studies, Institute for Molecular Science, Okazaki 444-8585, Japan (Kyushu Institute of Technology, Fukuoka, Japan)
Department of Functional Molecular Science, Graduate University for Advanced Studies, Okazaki 444-8585, Japan
抄録
We study the interplay of randomness, electron correlation, and dimensionality effects in weakly coupled half-filled Hubbard chains with weak quenched random potentials, based on the renormalization-group (RG) approach. We perform a two-loop RG analysis of an effective action derived by using the replica trick, and examine the following crossovers and phase transitions from an incoherent metal regime: (1) a crossover to the Anderson localization regime, (2) an antiferromagnetic phase transition, and (3) a crossover to the quasi-one-dimensional weak-localization regime. The case of d=1+ε (ε≪1) dimensions is also mentioned.
雑誌名
Physical review B. Condensed matter and materials physics
巻
62
号
20
ページ
13323 - 13337
発行年
2000-11-15
出版者
Published by the American Physical Society through the American Institute of Physics
Interplay of randomness, electron correlation, and dimensionality effects in quasi-one-dimensional conductors
p13323_1.pdf
(647.07KB)
