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On the metal-insulator transition in the two-chain model of correlated fermions | H.J. Schulz
; | Date: |
24 Jul 1998 | Subject: | Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con | Abstract: | 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_
ho 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. | Source: | arXiv, cond-mat/9807328 | Services: | Forum | Review | PDF | Favorites |
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