Far-infrared electrodynamics of thin superconducting NbN film in magnetic fields

0431280 - FZÚ 2015 RIV GB eng J - Článek v odborném periodiku
Šindler, Michal - Tesař, Roman - Koláček, Jan - Szabó, P. - Samuely, P. - Hašková, V. - Kadlec, Christelle - Kadlec, Filip - Kužel, Petr
Far-infrared electrodynamics of thin superconducting NbN film in magnetic fields.
Superconductor Science and Technology. Roč. 27, č. 5 (2014), 1-8. ISSN 0953-2048. E-ISSN 1361-6668
Grant CEP: GA ČR(CZ) GAP204/11/0015; GA MŠMT(CZ) LD14060
Institucionální podpora: RVO:68378271
Klíčová slova: superconductivity * thin films * scanning tunneling spectroscopy * time-domain terahertz spectroscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.325, rok: 2014

We studied a thin superconducting NbN film in magnetic fields up to 8 T above the zero-temperature limit by means of time-domain terahertz and scanning tunneling spectroscopies in order to understand the vortex response. Scanning tunneling spectroscopy was used to determine the optical gap and the upper critical field of the sample. The values obtained were subsequently used to fit the terahertz complex conductivity spectra in the magnetic field in the Faraday geometry above the zero-temperature limit. These spectra are best described in terms of the Coffey–Clem self-consistent solution of a modified London equation in the flux creep regime.
Trvalý link: http://hdl.handle.net/11104/0235858