Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN (Articolo in rivista)

Type
Label
  • 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)
Alternative label
  • Mintu Mondal (1); Sanjeev Kumar (1); Madhavi Chand (1); Anand Kamlapure (1); Garima Saraswat (1); G. Seibold (2); L. Benfatto (3); Pratap Raychaudhuri (1) (2011)
    Role of the vortex-core energy on the Beresinkii-Kosterlitz-Thouless transition in thin films of NbN
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • 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)
Pagina inizio
  • 217003 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 107 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 21 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 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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