1998/07/24 by H. J. Schulz · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.59.r2471
7 pages, 1 figure
arxiv created 1998/07/24 · openalex publication_date 1999/01/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The doping-induced metal-insulator transition in two-chain systems of correlated fermions is studied using a solvable limit of the t\ensuremath-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_\ensuremathρ 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.