Mondal, Mintu ; Chand, Madhavi ; Kamlapure, Anand ; Jesudasan, John ; Bagwe, Vivas C. ; Kumar, Sanjeev ; Saraswat, Garima ; Tripathi, Vikram ; Raychaudhuri, Pratap (2011) Phase Diagram and Upper Critical Field of Homogeneously Disordered Epitaxial 3-Dimensional NbN Films Journal of Superconductivity and Novel Magnetism, 24 (1-2). pp. 341-344. ISSN 1557-1939
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Official URL: http://link.springer.com/article/10.1007/s10948-01...
Related URL: http://dx.doi.org/10.1007/s10948-010-1038-8
Abstract
We report the evolution of superconducting properties with disorder, in 3-dimensional homogeneously disordered epitaxial NbN thin films. The effective disorder in NbN is controlled from moderately clean limit down to Anderson metal–insulator transition by changing the deposition conditions. We propose a phase diagram for NbN in temperature-disorder plane. With increasing disorder, we observe that as kFl→1 the superconducting transition temperature (Tc) and normal state conductivity in the limit T→0 (σ0) go to zero. The phase diagram shows that in homogeneously disordered 3-D NbN films, the metal–insulator transition and the superconductor–insulator transition occur at a single quantum critical point, kFl∼1.
Item Type: | Article |
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Source: | Copyright of this article belongs to Springer Verlag. |
Keywords: | NbN Films; Upper Critical Field (Hc2); Metal–Insulator Transition; Superconductor–Insulator Transition |
ID Code: | 105122 |
Deposited On: | 25 Dec 2017 11:35 |
Last Modified: | 25 Dec 2017 11:35 |
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