Metal-insulator transition in the two-chain model of correlated fermions

Article

关键词: 2-CHAIN HUBBARD-MODEL;    CORRELATION EXPONENTS;    CARBON NANOTUBES;    LADDER;    SYSTEMS;    SUPERCONDUCTIVITY;    DENSITY;   

DOI  :  10.1103/PhysRevB.59.R2471

来源: SCIE

【 摘 要 】

The doping-induced metal-insulator transition in two-chain systems of correlated fermions is studied using a solvable limit of the t-J model and the fact that various strong- and weak-coupling limits of the two-chain model are in the same phase, i.e., have the same low-energy properties. It is shown that the Luttinger-liquid parameter K-rho takes the universal value unity as the insulating state (half-filling) is approached, implying dominant d-type superconducting fluctuations, independently of the interaction strength. The crossover to insulating behavior of correlations as the transition is approached is discussed. [S0163-1829(99)50104-5].

【 授权许可】

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