2-HOLE BOUND-STATES IN A MODIFIED T-J MODEL

Article

关键词: QUANTUM ANTIFERROMAGNET;    DOPED ANTIFERROMAGNET;    SPIRAL PHASE;    DISPERSION-RELATION;    SPECTRAL-FUNCTION;    FERMI-SURFACE;    SINGLE HOLE;    MONTE-CARLO;    BINDING;    PLANE;   

DOI  :  10.1103/PhysRevB.52.12977

来源: SCIE

【 摘 要 】

We consider a modified t-J model with the minima of single-hole dispersion at the points (0, +/-pi), (+/- pi,0). It is shown that two holes in the antiferromagnetic background produce a bound state whose properties strongly differ from the states known in the unmodified t-J model. The bound state is d wave; it has four nodes on the face of the magnetic Brillouin zone. However, in the coordinate representation it looks like the usual s wave.

【 授权许可】

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