Critical Dimerization Strength of the Quarter-Filled t-J Model

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概要

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• An exact-distgonalization techniqtre on small clusters is trsed to sttrdy the grotrnd state of thedirnerized t-J tt?odel at qtrarter-filling. The eqtral-tiuaae charge and spin correlations, chargeand spin gaps, and binding energy are calctrlaxted for the two-diuaaensional lattice with a spatiatldimerization pattern corresponding to organic condtrctors x-(BEDT-TTF)xX. XN7e shoxv thatconapetition betw'een the efl'ects of' two types of' dittaeriz?ttion, i.e., diuaaerization in the hoppingintegral arud ditnerization in flue exchange itateraction, leads to the instrlator-strperconductortransition in the grotrnd statte of tlae taaodel. Tlae ph?tse disrgr?tzn is therel.>y presetuted.

• 社団法人日本物理学会の論文
• 1998-08-15

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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