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Low temperature properties of one-dimensional SU(4) Hubbard-like model at low concentration

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Abstract:

On the basis of Bethe ansatz solution of the one dimensional SU(4) Hubbard-like model, we have studied its thermodynamic properties by means of the Yang-Yang thermodynamic Bethe ansatz. The Landé g factors for both spin and orbit are taken into account so as to describe electrons with orbital degeneracy. The free energy at low temperature is given and the specific heat both in the strong coupling and weak coupling limits are obtained. At the same time, we also point out the three possible critical fields, which may cause a quantum phase transition.

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Authors and Affiliations

  1. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, 310027, PR China, , , , , , CN

    Shi-Jian Gu

  2. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, 310027, PR China and Institute for Physics, Augsburg University, 86135 Augsburg, Germany, , , , , , DE

    You-Quan Li

  3. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, 310027, PR China, , , , , , CN

    Zu-Jian Ying

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  1. Shi-Jian Gu
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  2. You-Quan Li
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  3. Zu-Jian Ying
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Received 3 August 2002 / Received in final form 17 January 2003 Published online 4 June 2003

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ID="a"e-mail: sjgu@zimp.zju.edu.cn

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Gu, SJ., Li, YQ. & Ying, ZJ. Low temperature properties of one-dimensional SU(4) Hubbard-like model at low concentration. Eur. Phys. J. B 33, 147–152 (2003). https://doi.org/10.1140/epjb/e2003-00151-2

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  • DOI: https://doi.org/10.1140/epjb/e2003-00151-2

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