Collective vortex motion in a-MoGe superconducting thin films

W. R. White; A. Kapitulnik; M. R. Beasley

doi:10.1103/PhysRevLett.70.670

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Collective vortex motion in a-MoGe superconducting thin films

W. R. White, A. Kapitulnik, M. R. Beasley

DOI 10.1103/PhysRevLett.70.670 · Physical Review Letters

T1

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Abstract

We report linear and nonlinear electrical transport in perpendicular magnetic fields of very thin amorphous Mo79Ge21 superconducting films. At low fields, we demonstrate the existence of a barrier to vortex motion away from the sample edges. In regimes where the vortex motion is not substantially affected by the sample edges, we observe manifestly collective activated behavior. We relate the field dependence of the observed activation energies to possible mobile configurations of vortices.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Mo79Ge21 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.61	Pressure not reported	onset
Mo79Ge21 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.63	Pressure not reported	onset
Mo79Ge21 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.46	Pressure not reported	onset
Mo79Ge21 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.89	Pressure not reported	onset