Thermodynamics of the one-dimensional SU(4) symmetric spin-orbital model

Details Thermodynamics of the one-dimensional SU(4) symmetric spin-orbital model Thermodynamics of the one-dimensional SU(4) symmetric spin-orbital model

1998-07-13

arxiv.org/abs/cond-mat/9807179v1

Phys. Rev. Lett. 82, 000835 (1999)

Physics

Condensed Matter

4 pages, 4 figures, RevTeX

Scientific paper

10.1103/PhysRevLett.82.835

The ground state properties and the thermodynamics of the one-dimensional SU(4) symmetric spin system with orbital degeneracy are investigated using the quantum Monte Carlo loop algorithm. The spin-spin correlation functions exhibit a 4-site periodicity, and their low temperature behavior is controlled by two correlation lengths that diverge like the inverse temperature, while the entropy is linear in temperature and its slope is consistent with three gapless modes of velocity $\pi/2$. The physical implications of these results are discussed.

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