作者: Masao Ogata , M. U. Luchini , S. Sorella , F. F. Assaad
DOI: 10.1103/PHYSREVLETT.66.2388
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摘要: The phase diagram of the one-dimensional t-J model is investigated by analyzing results exact diagonalization and solutions at J/t=0 2. Phase separation takes place above a critical value J around ${\mathit{J}}_{\mathit{c}}$/t=2.5--3.5 depending on electron density. In small-J region, Tomonaga-Luttinger liquid theory holds its correlation exponents are calculated as function J/t Superconducting correlations become dominant in region between solvable case (J/t=2) separation. A spin-gap also found low