Quantum phase transitions in a spin-1/2 alternating Heisenberg antiferromagnetic chain under a staggered transverse magnetic field

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The magnetic behaviors of a spin-1/2 alternating Heisenberg antiferromagnetic chain in a staggered transverse magnetic field is studied by means of the density-matrix renormalization group method and Jordan-Wigner transformation. Quantum phase transitions of different types are observed in the S=1 Neel and XY-like gapless phases, which result from the competitions between the staggered transverse field and magnetic orders induced by anisotropy and alternating interactions. The results are compared with the mean-field and some exactly resolved results.
5 pages, 4 figures, published in Phys. Lett. A, 373,1687

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/225876

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0812.4634
 http://arxiv.org/abs/0812.4634
 Phys. Lett. A, 373, 1687 (2009)
 doi:10.1016/j.physleta.2008.12.073

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arXiv