Approximate Decoupling of Spin and Charge Excitations in the Two-Dimensional t-J Model

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概要

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• The single-particle spectral ftrnctions for the two-dimensional t-J model are investigated inconnection with spin and charge dynamics, tmsing the exact diagonalization technique. At lowelectron density, Fermi liquid behavior is observed. Near half-filling, the spectral functions reveala two-peak structure which is due to the different dynamics of spin and charge degrees of freedom.This density dependence of the spectral ftrnctions indicates a crossover from Ferrni liquid behaviorat low density to anomalous behavior near the Mott transition where the approximate decouplingof spin and charge excitations occurs.

• 社団法人日本物理学会の論文
• 1996-07-15

著者

• Tohyama Takami

  Department Of Physics Faculty Of Education Mie University

• MAEKAWA Sadamichi

  Department of Applied Physics,Nagoya University

• Maekawa Sadamichi

  Department Of Applied Physics Nagoya University

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