Quantum tunneling of flux lines in a high-Tc superconductor

M. W. Gaber; B. N. N. Achar

doi:10.1103/PhysRevB.52.1314

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Quantum tunneling of flux lines in a high-Tc superconductor

M. W. Gaber, B. N. N. Achar

DOI 10.1103/PhysRevB.52.1314 · Physical Review B

T1

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Abstract

The quantum flux creep model of Ivlev et al. has been extended to include the dissipative and inertial mass contributions to the bounce action. The crossover temperature, the activation energy, and the quantum tunneling rate are evaluated numerically. This has been carried out by a perturbation expansion retaining only the leading-order term deemed to be valid in the vicinity of and below the crossover temperature. It is found that the crossover temperature and the activation energy are relatively unchanged but the quantum tunneling rate is drastically reduced when compared with the estimates of Ivlev et al. Furthermore, the quantum tunneling rate is temperature dependent in the neighborhood of the crossover temperature.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
PbMoS Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LaSrCuO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBCO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown