http://www.cnr.it/ontology/cnr/individuo/prodotto/ID198267
Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN (Articolo in rivista)
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- Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevLett.107.217003 (literal)
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- Mintu Mondal (1); Sanjeev Kumar (1); Madhavi Chand (1); Anand Kamlapure (1); Garima Saraswat (1); G. Seibold (2); L. Benfatto (3); Pratap Raychaudhuri (1) (literal)
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- 1 Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
2 Institut Für Physik, BTU Cottbus, P.O. Box 101344, 03013 Cottbus, Germany
3 ISC-CNR and Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy (literal)
- Titolo
- Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN (literal)
- Abstract
- We analyze the occurrence of the Berezinskii-Kosterlitz-Thouless (BKT) transition in thin films of NbN at various film thickness, by probing the effect of vortex fluctuations on the temperature dependence of the superfluid density below T-BKT and of the resistivity above T-BKT. By direct comparison between the experimental data and the theory, we show the crucial role played by the vortex-core energy in determining the characteristic signatures of the BKT physics, and we estimate its dependence on the disorder level. Our work provides a paradigmatic example of BKT physics in a quasi-two-dimensional superconductor. (literal)
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