Universal scaling behaviour near vortex-solid/glass to vortex-fluid transition in type-II superconductors in two and three dimensions

Kumar Kundu, H and Jesudasan, J and Raychaudhuri, P and Mukerjee, S and Bid, A (2019) Universal scaling behaviour near vortex-solid/glass to vortex-fluid transition in type-II superconductors in two and three dimensions. In: EPL, 128 (2).

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Abstract

In this paper, we present evidence for the existence of vortex-solid/glass (VG) to vortex-fluid (VF) transition in a type-II superconductor (SC), NbN. We probed the VG to VF transition in both 2D and 3D films of NbN through studies of magnetoresistance and current-voltage characteristics. The dynamical exponents corresponding to this phase transition were extracted independently of the two sets of measurements. The H-T phase diagram for the 2D and 3D SC are found to be significantly different near the critical point. In the case of 3D SC, the exponent values obtained from the two independent measurements show excellent match. On the other hand, for the 2D SC, the exponents obtained from the two experiments were significantly different. We attribute this to the fact that the characteristic length scale diverges near the critical point in a 2D SC in a distinctly different way from its 3D counterpart form scaling behaviour.

Item Type:	Journal Article
Publication:	EPL
Publisher:	Institute of Physics Publishing
Additional Information:	The copyright of this article belongs to Institute of Physics Publishing
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	30 Jun 2020 07:20
Last Modified:	30 Jun 2020 07:20
URI:	http://eprints.iisc.ac.in/id/eprint/64922

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