A Model Study of the Low-Energy Charge Dynamics of NaV_2O_5
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概要
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An exact-diagonalization technique on small clusters is used to calctrlate the dynamical densitycorrelation f'unctions of the dinaerized t-J chain and cotrpled anisotropic t-J ladders (trellislattice) at quarter-filling, i.e., the systeraas regarded as a network of pairs (dimers or rtrngs) ofsites cotrpled weakly via the hopping and exchange interactions. We tlaereby demonstrate thatthe intersite Cotrlonab repulsions betxveen the pairs indtrce a loxv-energy collective naode in thecharge excitations of the systems xvhere the internal charge degrees of freedotta of the patirs playan essential role, Implicatiorus to the electronic states of NaVxOs, i.e., flucttrations of the valencestate of' V Tons and phase transition as a charge ordering, are disctrssed.
- 社団法人日本物理学会の論文
- 1998-12-15
著者
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Nishimoto Satoshi
Graduate School Of Science And Technology Chiba University
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Ohta Yukinori
Department Of Applied Physics Nagoya University
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Ohta Yukinori
Department Of Physics Chiba-university
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