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Temperature driven crossover phenomena in the correlation lengths of the one-dimensional t-J model | J. Sirker
; A. Klümper
; | Date: |
16 Dec 2002 | Journal: | Europhys. Lett. 60, 262 (2002) DOI: 10.1209/epl/i2002-00345-2 | Subject: | Strongly Correlated Electrons | cond-mat.str-el | Abstract: | We describe a modified transfer matrix renormalization group (TMRG) algorithm and apply it to calculate thermodynamic properties of the one-dimensional t-J model. At the supersymmetric point we compare with Bethe ansatz results and make direct connection to conformal field theory (CFT). In particular we study the crossover from the non-universal high T lattice into the quantum critical regime by calculating various correlation lengths and static correlation functions. Finally, the existence of a spin-gap phase is confirmed. | Source: | arXiv, cond-mat/0212369 | Services: | Forum | Review | PDF | Favorites |
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