Temperature-driven crossover phenomena in the correlation lengths of the one-dimensional -J model

2002/10/01 by Jesko Sirker, J. Sirker, Andreas Klümper +1 · 2 citations
Economics, Econometrics and Finance · Physics and Astronomy · #Complex Systems and Time Series Analysis #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.1209/epl/i2002-00345-2

published as Europhys. Lett. 60, 262 (2002) · 7 pages, 7 figures

openalex publication_date 2002/10/01 · arxiv created 2002/12/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

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.

Cited by

• Half-filled one-dimensional extended Hubbard model: Phase diagram and thermodynamics
• QUANTUM CORNER — TRANSFER MATRIX DMRG

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