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ANTIFERROMAGNETIC THEORETICAL CALCULATION FOR HlGH-Tc SUPERCONDUCTORS

DU AN WEI GUO-ZHU NIE HUI-QUAN

ANTIFERROMAGNETIC THEORETICAL CALCULATION FOR HlGH-Tc SUPERCONDUCTORS

DU AN, WEI GUO-ZHU, NIE HUI-QUAN
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  • Received Date:  18 October 1991
  • Published Online:  05 May 1992

ANTIFERROMAGNETIC THEORETICAL CALCULATION FOR HlGH-Tc SUPERCONDUCTORS

  • 1. 东北工学院物理系,沈阳110006

Abstract: Considering layer-structural characteristico of high-Tc superconductors, the effective Hamiltonian is derived within linear spin wave approximation for aniso-tropic three-dimensional Hubbard model in the large U limit. The Sublattice magnetization, internal energy, Specific heat, parallel and perpindicular susceptibilies of the system are Calculated by using the equation of motion for matrix Green's function. It is shown that the ratio (δ=J⊥/J) of antiferromagnetic interplanar Coupling to planar coupling has an important effect upon these quantities. In the Low temperature regime T?2J(2+δ)/kB, a characteristic temperature T0=2J(2δ(2+δ))1/2/kB is given, the asympototic expressions of these quantities are respectively obtained for T?T0 and T?T0.

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