Electronic and Magnetic Properties of Metallic Phases under Coexisting Short-Range Interaction and Diagonal Disorder

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概要

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• We study a three-dimensional Anderson–Hubbard model under the coexistence of short-range interaction and diagonal disorder within the Hartree–Fock approximation. We show that the density of states at the Fermi energy is suppressed in the metallic phases near the metal–insulator transition as a proximity effect of the soft Hubbard gap in the insulating phases. The transition to the insulator is characterized by a vanishing density of states (DOS) in contrast to the formation of a quasiparticle peak at the Fermi energy obtained using the dynamical mean field theory in pure systems. Furthermore, we show that there exist frozen spin moments in the paramagnetic metal.

• 2010-09-15

著者

• Imada Masatoshi

  CREST, JST, Bunkyo, Tokyo 113-8656, Japan

• Shinaoka Hiroshi

  Nanosystem Research Institute, AIST, Tsukuba, Ibaraki 305-8568, Japan

• Imada Masatoshi

  CREST, JST, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan

関連論文

• Theory of Electron Transport near Anderson–Mott Transitions
• Electronic and Magnetic Properties of Metallic Phases under Coexisting Short-Range Interaction and Diagonal Disorder
• Mott Transition and Phase Diagram of \kappa-(BEDT-TTF)2Cu(NCS)2 Studied by Two-Dimensional Model Derived from Ab initio Method

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