Quantum spin glass in anisotropic dipolar systems

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The spin-glass phase in the $\LHx$ compound is considered. At zero transverse field this system is well described by the classical Ising model. At finite transverse field deviations from the transverse field quantum Ising model are significant, and one must take properly into account the hyperfine interactions, the off-diagonal terms in the dipolar interactions, and details of the full J=8 spin Hamiltonian to obtain the correct physical picture. In particular, the system is not a spin glass at finite transverse fields and does not show quantum criticality.
6 pages, 2 figures, to appear in J. Phys. Condens. Matter (proceedings of the HFM2006 conference)

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Disordered Systems and Neural Networks, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/126207

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0608622
 http://arxiv.org/abs/cond-mat/0608622
 J. Phys.: Condens. Matter 19 (2007) 145218.
 doi:10.1088/0953-8984/19/14/145218

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