Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature
Results of X-band microwave surface impedance measurements of FeSe₁–xTex very thin film are reported. The effective surface resistance shows appearance of peak at T ≤ Tc when plotted as a function of temperature. The authors suggests that the most well-reasoned explanation can be based on the idea o...
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| Published in: | Физика низких температур |
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| Date: | 2014 |
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| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2014
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/119522 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature / A.A. Barannik, N.T. Cherpak, Yun Wu, Sheng Luo, Yusheng He, M.S. Kharchenko, A. Porch // Физика низких температур. — 2014. — Т. 40, № 6. — С. 636-644. — Бібліогр.: 31 назв. — англ. |
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Barannik, A.A. Cherpak, N.T. Yun Wu Sheng Luo Yusheng He Kharchenko, M.S. Porch, A. 2017-06-07T08:04:16Z 2017-06-07T08:04:16Z 2014 Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature / A.A. Barannik, N.T. Cherpak, Yun Wu, Sheng Luo, Yusheng He, M.S. Kharchenko, A. Porch // Физика низких температур. — 2014. — Т. 40, № 6. — С. 636-644. — Бібліогр.: 31 назв. — англ. 0132-6414 PACS 74.20.Rp, 74.25.Ha, 74.25.nn, 74.70.Xa https://nasplib.isofts.kiev.ua/handle/123456789/119522 Results of X-band microwave surface impedance measurements of FeSe₁–xTex very thin film are reported. The effective surface resistance shows appearance of peak at T ≤ Tc when plotted as a function of temperature. The authors suggests that the most well-reasoned explanation can be based on the idea of the changing orientation of the microwave magnetic field at a S–N phase transition near the surface of a very thin film. The magnetic penetration depth exhibits a power-law behavior of L(T) CTn, with an exponent n ≈ 2.4 at low temperatures, which is noticeably higher than in the published results on FeSe₁–xTex single crystal. However the temperature dependence of the superfluid conductivity remains very different from the behavior described by the BCS theory. Experimental results are fitted very well by a two-gap model with Δ₁/kTc = 0.43 and Δ₂/kTc = 1.22, thus supporting s±-wave symmetry. The rapid increase of the quasiparticle scattering time is obtained from the microwave impedance measurements. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Свеpхпpоводимость, в том числе высокотемпеpатуpная Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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| title |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature |
| spellingShingle |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature Barannik, A.A. Cherpak, N.T. Yun Wu Sheng Luo Yusheng He Kharchenko, M.S. Porch, A. Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| title_short |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature |
| title_full |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature |
| title_fullStr |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature |
| title_full_unstemmed |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature |
| title_sort |
unusual microwave response and bulk conductivity of very thin fese₀.₃te₀.₇ films as a function of temperature |
| author |
Barannik, A.A. Cherpak, N.T. Yun Wu Sheng Luo Yusheng He Kharchenko, M.S. Porch, A. |
| author_facet |
Barannik, A.A. Cherpak, N.T. Yun Wu Sheng Luo Yusheng He Kharchenko, M.S. Porch, A. |
| topic |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| topic_facet |
Свеpхпpоводимость, в том числе высокотемпеpатуpная |
| publishDate |
2014 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
Results of X-band microwave surface impedance measurements of FeSe₁–xTex very thin film are reported. The effective surface resistance shows appearance of peak at T ≤ Tc when plotted as a function of temperature. The authors suggests that the most well-reasoned explanation can be based on the idea of the changing orientation of the microwave magnetic field at a S–N phase transition near the surface of a very thin film. The magnetic penetration depth exhibits a power-law behavior of L(T) CTn, with an exponent n ≈ 2.4 at low temperatures, which is noticeably higher than in the published results on FeSe₁–xTex single crystal. However the temperature dependence of the superfluid conductivity remains very different from the behavior described by the BCS theory. Experimental results are fitted very well by a two-gap model with Δ₁/kTc = 0.43 and Δ₂/kTc = 1.22, thus supporting s±-wave symmetry. The rapid increase of the quasiparticle scattering time is obtained from the microwave impedance measurements.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/119522 |
| citation_txt |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature / A.A. Barannik, N.T. Cherpak, Yun Wu, Sheng Luo, Yusheng He, M.S. Kharchenko, A. Porch // Физика низких температур. — 2014. — Т. 40, № 6. — С. 636-644. — Бібліогр.: 31 назв. — англ. |
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| first_indexed |
2025-11-28T07:29:16Z |
| last_indexed |
2025-11-28T07:29:16Z |
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