Electronic transport and vortex dynamics in the low-temperature liquid phase of an ultrathin Corbino-disk

We study the possible edge-pinning effects on the electronic transport and vortex-flow motion in the low-temperature (T) liquid phase of thin amorphous MoxSi1−x films with the Corbino-disk (CD) and strip(-like) contact geometries. For CD, we observe the two-dimensional (2D) field-driven superconduct...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2006-05, Vol.437-438, p.247-250
Main Authors: Okuma, S., Kishimoto, T., Kainuma, K.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Corbino-disk
Edge effects
Exact sciences and technology
Granular, melt-textured, amorphous and composite superconductors
Inhomogeneous superconductors and superconducting systems
Physics
Properties of type I and type II superconductors
Superconducting–insulator transition
Superconductivity
Vortex glass
Vortex lattices ,flux pinning, flux creep
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Summary:We study the possible edge-pinning effects on the electronic transport and vortex-flow motion in the low-temperature (T) liquid phase of thin amorphous MoxSi1−x films with the Corbino-disk (CD) and strip(-like) contact geometries. For CD, we observe the two-dimensional (2D) field-driven superconductor–insulator transition (FSIT) at T=0 and anomalous vortex-flow motion at low T, suggestive of strong quantum fluctuations, which are similar to those observed in usual strip-shaped films. These results indicate that the edge effects are not important in our disordered films and that both the 2D FSIT and anomalous vortex motion at low T are intrinsic properties.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2005.12.084