Hole-Doping Effects on a Frustrated Spin Ladder

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概要

• 論文の詳細を見る

• Hole-doping effects are inverstigated on the t-J ladder model with the linked-tetrahedra structure. We discuss how a metal-insulator transition occurs upon hole doping with particular emphasis on the effects of geometrical frustration. By computing the electron density and the spin correlation function by the density matrix renormalization group, we show that strong frustration triggers a first-order transition to a metallic phase, when holes are doped into the plaquette-singlet phase. By examining spin excitations in a metallic case in detail, we discuss whether the spin-gap phase persists upon hole doping according to the strength of frustration. It is further shown that the lowest excited stale in a spin-gap metallic phase can be described in two independent quasi particles.

• 社団法人日本物理学会の論文
• 2003-02-15

著者

• OKUNISHI Kouichi

  Department of Physics, Niigata University

• Koga Akihisa

  Department Of Applied Physics Osaka University

• Kawaguchi Akira

  Department Of Applied Physics Osaka University

• Okunishi K

  Niigata Univ. Niigata

• Okunishi Kouichi

  Department Of Physics Faculty Of Science Niigata University

• Okunishi Kouichi

  Department Of Physics Faculty Of Science Niigata Univeristy

• Kawaguchi Akira

  Department Of Marine Sciences Faculty Of Science University Of The Ryukyus

• Kawaguchi Akira

  Department Of Appkied Physics Osaka University

• Kawaguchi Akira

  Laboratory Of Soil Microbiology Division Of Soil Science And Plant Production Department Of Plant Re

• Koga A

  Department Of Physics Kyoto University

• KOGA Akihiko

  Department of Appkied Physics, Osaka University

• KAWAKMI Norio

  Department of Applied Physics, Osaka University

• Kawakmi Norio

  Department Of Applied Physics Osaka University

• 古賀 章彦

  Division Of Biological Science Graduate School Of Science Nagoya University

• Koga Akihiko

  Department Of Appkied Physics Osaka University

• Okunishi Kouich

  Department Of Physics Faculty Of Science Niigata University

• OKUNISHI Kouichi

  Department of Applied Physics, Graduate School of Engineering Osaka University

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