Quantum Tunneling and Phase Transitions in Spin Systems with an Applied Magnetic Field

Details Quantum Tunneling and Phase Transitions in Spin Systems with an Applied Magnetic Field Quantum Tunneling and Phase Transitions in Spin Systems with an Applied Magnetic Field

1998-06-08

arxiv.org/abs/cond-mat/9806100v1

Physics

Condensed Matter

18 pages, 7 figures

Scientific paper

10.1103/PhysRevB.58.5554

Transitions from classical to quantum behaviour in a spin system with two degenerate ground states separated by twin energy barriers which are asymmetric due to an applied magnetic field are investigated. It is shown that these transitions can be interpreted as first- or second-order phase transitions depending on the anisotropy and magnetic parameters defining the system in an effective Lagrangian description.

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