Weak-coupling phase diagram of the two-chain Hubbard model

Article

关键词: ONE-DIMENSIONAL CONDUCTORS;    SUPERCONDUCTIVITY;    FERMIONS;    GAS;   

DOI  :  10.1103/PhysRevB.53.12133

来源: SCIE

【 摘 要 】

We present a general method for determining the phase diagram of systems of a finite number of one-dimensional Hubbard-like systems coupled by single-particle hopping with weak interactions. The technique is illustrated by detailed calculations for the two-chain Hubbard model, providing controlled results for arbitrary doping and interchain hopping. Of nine possible states which could occur in such a spin-1/2 ladder, we find seven at weak coupling. We discuss the conditions under which the model can be regarded as a one-dimensional analog of a superconductor.

【 授权许可】

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