Charge Ordering in θ-(BEDT-TTF)_2X Materials

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概要

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• We theoretically investigate charge ordered states on the anisotropic triangular lattice characteristic of the θ-(BEDT-TTF)_2X materials. Using exact diagonalization studies, we establish that the charge order (CO) pattern corresponds to a "horizontal" stripe structure, with ...1100...CO along the two directions with larger electron hopping (p-directions), and ...1010...CO along the third direction (c-direction). The CO is accompanied by co-operative bond dimerizations along all three directions in the highest spin state. In the lowest spin state bonds along the p-directions are tetramerized. Our theory explains the occurrence of a charge-induced high temperature transition as well as a spin gap transition at lower temperature.

• 社団法人日本物理学会の論文
• 2002-08-15

著者

• Mazumdar Sumit

  Cooperative Excitation Project Erato Japan Science And Technology Corporation (jst)

• Torsten CLAY

  Department of Physics, University of Arizona

• CAMPBELL David

  Departments of Electrical and Computer Engineering and Physics, Boston University

• Torsten Clay

  Department Of Physics University Of Arizona

• Clay R.

  Department Of Physics University Of Arizona

• Campbell David

  Departments Of Electrical And Computer Engineering And Physics Boston University

関連論文

• Charge Ordering in θ-(BEDT-TTF)_2X Materials

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