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Original title:
Far-infrared magneto-optical measurements of superconducting NbN layer
Authors: Koláček, Jan ; Skrbek, L. ; Šindler, M. ; Tesař, Roman
Document type: Papers
Conference/Event: Annual conference of doctoral students - WDS 2009 /18./, Prague (CZ), 2009-06-02 / 2009-06-05
Year: 2009
Language: eng
Abstract: 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.
Keywords: far-infrared transmission; magnetic vortices; NbN; superconducting film
Project no.: CEZ:AV0Z10100521 (CEP), GA202/08/0326 (CEP)
Funding provider: GA ČR
Host item entry: WDS ’09 Proceedings of Contributed Papers. Part III, ISBN 978-80-7378-103-3
Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0185276
Permalink: http://www.nusl.cz/ntk/nusl-41402
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics
Conference materials > Papers
Authors: Koláček, Jan ; Skrbek, L. ; Šindler, M. ; Tesař, Roman
Document type: Papers
Conference/Event: Annual conference of doctoral students - WDS 2009 /18./, Prague (CZ), 2009-06-02 / 2009-06-05
Year: 2009
Language: eng
Abstract: 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.
Keywords: far-infrared transmission; magnetic vortices; NbN; superconducting film
Project no.: CEZ:AV0Z10100521 (CEP), GA202/08/0326 (CEP)
Funding provider: GA ČR
Host item entry: WDS ’09 Proceedings of Contributed Papers. Part III, ISBN 978-80-7378-103-3
Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0185276
Permalink: http://www.nusl.cz/ntk/nusl-41402
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics
Conference materials > Papers
Record created 2011-07-01, last modified 2024-01-26