Quantum creep in layered antiferromagnetic superconductor

Details Quantum creep in layered antiferromagnetic superconductor Quantum creep in layered antiferromagnetic superconductor

2011-06-16

arxiv.org/abs/1106.3182v1

Physics

Condensed Matter

Superconductivity

11 pages and 5 figures

Scientific paper

In the mixed state of layered superconductor the antiferromagnetic order of magnetic ions could possibly create the spin-flop domains along the phase cores of the Josephson vortices. We discuss how this feature affects the activation energy in the macroscopic quantum tunnelling of the Josephson vortex. We show that the action and hence activation energy is rendered temperature dependent so that the quantum tunnelling rate becomes temperature dependent below the crossover temperature. We show that it in such systems in constant temperature it is possible to occur of two regimes of the flux creep, thermal or quantum, dependent on the direction or intensity of the applied magnetic field.

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