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Far-infrared magneto-optical measurements of superconducting NbN layer

SYSNO ASEP	0342575
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Far-infrared magneto-optical measurements of superconducting NbN layer
Author(s)	Koláček, Jan (FZU-D)_{RID, ORCID} Skrbek, L. (CZ) Šindler, M. (CZ) Tesař, Roman (FZU-D)_{RID, ORCID}
Source Title	WDS ’09 Proceedings of Contributed Papers. Part III. - Praha : MATFYZPRESS, 2009 / Šafránková J. ; Pavlů J. - ISBN 978-80-7378-103-3
Pages	s. 124-129
Number of pages	6 s.
Action	Annual conference of doctoral students - WDS 2009 /18./
Event date	02.06.2009-05.06.2009
VEvent location	Prague
Country	CZ - Czech Republic
Event type	WRD
Language	eng - English
Country	CZ - Czech Republic
Keywords	far-infrared transmission ; NbN ; superconducting film ; magnetic vortices
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GA202/08/0326 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
Annotation	Temperature dependence of far-infrared transmission of thin layer NbN deposited on SiO2 substrate has been measured at frequencies 0.40, 0.65 and 2.52 THz. The zero magnetic field data are in agreement with previous measurements. Additionally, temperature dependent transmission at 0.40 THz for parallel and perpendicular magnetic field orientation with respect to NbN layer from 1 to 10 tesla is reported. In order to interpret our data, we have calculated the transmission of the NbN layer using equations for complex conductivity. For zero magnetic field, the experimental and computed data are in good agreement. With increasing field, however, the experimental data start to deviate from the model prediction that neglects effects due to quantized vortices penetrating the superconductor. When moving, they absorb energy and affect both reflection and transmission. Presently, no way of calculating the complex conductivity in the presence of quantized vortices from the BCS theory is known.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1