Magnetic Field Induced Ordering in Quasi-One-Dimensional Quantum Magnets

Details Magnetic Field Induced Ordering in Quasi-One-Dimensional Quantum Magnets Magnetic Field Induced Ordering in Quasi-One-Dimensional Quantum Magnets

1999-05-21

arxiv.org/abs/cond-mat/9905331v1

Eur. Phys. J. B 16, 393 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTex, 12 pages with 4 figures

Scientific paper

10.1007/s100510070194

Three-dimensional magnetic ordering transitions are studied theoretically in strongly anisotropic quantum magnets. An external magnetic field can drive quasi-one-dimensional subsystems with a spin gap into a gapless regime, thus inducing long-range three-dimensional magnetic ordering due to weak residual magnetic coupling between the subsystems. Compounds with higher spin degrees of freedom, such as N-leg spin-1/2 ladders, are shown to have cascades of ordering transitions. At high magnetic fields, zero-point fluctuations within the quasi-1D subsystems are suppressed, causing quantum corrections to the ordering temperature to be reduced.

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