Optical Conductivity of the Trellis-Lattice t-J Model : Charge Fluctuations in NaV_2O_5

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概要

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• Optical conductivity of the trellis lattice t-J zaaodel at quarter filling is calculated by an exact-diagonalization technique on SlTL2Lll clusters, whereby the valence state of V Tons of N2LV205is considered. We show that the experirtaental f'eatures at 'vl eV, including peak positions,presence of shotrlders, and anisotropic spectral weight, can be reproduced in a reaxsonable rangeof parameter valtres, only by asstrnaing that the systenu is in the charge disproportionated groundstate. Possible reconciliation with experinaental data suggesting the presence of trniforrn laddersat T >Tc is discussed.

• 社団法人日本物理学会の論文
• 1998-11-15

著者

• Nishimoto Satoshi

  Graduate School Of Science And Technology Chiba University

• Ohta Yukinori

  Graduate School Of Science And Technology Chiba University:department Of Physics Chiba University

関連論文

• Theoretical Study on Superconductivity in Boron-Doped Diamond(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Optical Conductivity of the Trellis-Lattice t-J Model : Charge Fluctuations in NaV_2O_5
• NaV_2O_5 as an Anisotropic t-J Ladder at Quarter Filling
• Critical Dimerization Strength of the Quarter-Filled t-J Model
• A Model Study of the Low-Energy Charge Dynamics of NaV_2O_5
• Madelung Energy and Charge Ordering in β-Phase Vanadate Bronzes
• Charge and Orbital Ordering in the Triangular-Lattice t_-Orbital System in One Dimension : A Possible Ground State of Bi_xV_8O_

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