Spin-charge separation and superconductivity from the t-J model

M. J. Rice; Y. R. Wang

doi:10.1103/PhysRevB.48.12921

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Spin-charge separation and superconductivity from the t-J model

M. J. Rice, Y. R. Wang

DOI 10.1103/PhysRevB.48.12921 · Physical Review B

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Abstract

With use of a spin-charge-separation treatment of the t-J model that accurately imposes the constraint of single electron site occupancy, a number of interesting results are obtained for the superconducting state. The most relevant is that superconductivity arises from $p—-wave pairing of holons. This pairing leads to temperature (T) dependences of the electronic properties that are essentially the same as those given by s-wave BCS theory and suggests the possibility that the electrons are correlated in singlet pairs that are symmetric with respect to interchange of spin. On the other hand, the magnetic properties are dominated by the excitations of the spin liquid, leading to a spin susceptibility χs that is proportional to T and a nuclear-magnetic-resonance relaxation rate 1/T1T that is proportional to T2.