Daptary, Gopi Nath and Kumar, Shelender and Kumar, Pramod and Dogra, Anjana and Mohanta, N. and Taraphder, A. and Bid, Aveek (2016) Correlated non-Gaussian phase fluctuations in LaAlO3/SrTiO3 heterointerfaces. Physical Review B , 94 (8). 085104-1-085104-9. ISSN 2469-9950

PDF - Published Version
Download (771Kb) | Preview


We probe the existence of large correlated non-Gaussian phase fluctuations in the vicinity of the superconducting phase transition in the conducting layer residing at the interface of LaAlO3/SrTiO3 heterostructures. The non-Gaussian fluctuations appear between the Berezinskii-Kosterlitz-Thouless transition temperature T-BKT and the mean-field transition temperature T-C. Subsequent theoretical analysis reveals that non-Gaussianity arises predominantly due to the percolative transition of a Josephson coupled network of superconductors. Our results confirm that the superconductivity in this system is confined to two dimensions. Our study of the non-Gaussian resistance fluctuation spectrum provides a novel means to explore the BKT transition in two-dimensional inhomogeneous superconductors.

Item Type: Article
Subjects: Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 16 Nov 2017 08:34
Last Modified: 16 Nov 2017 08:34
URI: http://npl.csircentral.net/id/eprint/2168

Actions (login required)

View Item View Item