Large-N expansion based on the Hubbard operator path integral representation and its application to the t-J model

Article

关键词: SUPERCONDUCTING INSTABILITIES;    HAMILTONIAN REDUCTION;    SLAVE-PARTICLE;    QUANTIZATION;    DYNAMICS;    CHARGE;    RULES;    ORDER;    LIMIT;    SPIN;   

DOI  :  10.1103/PhysRevB.65.195107

来源: SCIE

【 摘 要 】

In the present work we have developed a large-N expansion for the t-J model based on the path integral formulation for Hubbard operators. Our large-N expansion formulation contains diagrammatic rules, in which the propagators and vertex are written in term of Hubbard operators. Using our large-N formulation we have calculated, for J=0, the renormalized O(1/N) boson propagator. We also have calculated the spin-spin and charge-charge correlation functions to leading order 1/N. We have compared our diagram technique and results with existing ones in the literature.

【 授权许可】

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