NaV_2O_5 as an Anisotropic t-J Ladder at Quarter Filling

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概要

• 論文の詳細を見る

• Based on recent experiuaaental evidences that the electronic charge degrees of freedona play anessential role in the spin-Peierls -like phase transition of NaVzO5, we first utaake the uaaapping of'low-energy electronic states of the cl - p uaaodel f'or NaV3O5 to the qtuarter-filled t - J ladderwith anisotropic parameter valtres between legs ?tnd ILlIlgS, and then show that this anisotropict - J latdder is in the ]VIott instrlating state, the lowest-energy states of which can be taaodeled bythe antiferroraaagnetic Heisenberg chain with the efl'ective exchange interaction J.? xvhose valtreis consistent with experiunental estiuttates. NVe f'trrtheruaaore exauaaine the coupling between theladders as the trellis lattice tnodel ?tnd shoxv that the neatrest-neighbor Cotrlouaab repulsion on thezigzag-chain bonds can lead to the instability in the charge degrees of freedom of' the ladders.

• 社団法人日本物理学会の論文
• 1998-09-15

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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