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Bulletin of Pure and Applied Sciences- Physics (Started in 1982)
eISSN: 2320-3218
pISSN: 0970-6569
Impact Factor: 6.987 (2018)
DOI: 10.5958/2320-3218
Editor-in-Chief: Prof. Madan jee,
About Journal More Archive Visit IndianJournals.com

Current Issue

Some Finite Temperature Characteristics of the High-Tc Cuprates within t-J-U Model

C Tarafdar1, K Roy2, N K Ghosh3,*
Author’s Affiliation : 1-3Department of Physics, University of Kalyani, Kalyani, West Bengal 741235, India

Corresponding Author : N.K. Ghosh, Department of Physics, University of Kalyani, Kalyani, West Bengal 741235, India ,
E-Mail:-[email protected]

Abstract

The effects of nearest-neighbor (NN) antiferromagnetic (AF) exchange interaction (J) and temperature on high-T_ccuprates have been studied using an eight-site frustrated t-J-U model. Average hole density is taken as = 0.25, appropriate for cuprates. Above a critical temperature, local moment decreases with temperature but increases with J/t. Corresponding double occupancy shows the reverse character. The system becomes more disordered with NN AF interaction. Low temperature specific heat curves show single peak structure where the peak-height decreases with J/t. The t-J-U model appears to be of non-Fermi liquid character

Keywords

High-Tc cuprates, t-J-U model, Thermodynamic properties

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