Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Unusual microwave response and bulk conductivity of very thin FeSe₀.₃Te₀.₇ films as a function of temperature
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| Creator |
Barannik, A.A.
Cherpak, N.T. Yun Wu Sheng Luo Yusheng He Kharchenko, M.S. Porch, A. |
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| Subject |
Свеpхпpоводимость, в том числе высокотемпеpатуpная
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| 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.
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| Date |
2017-06-07T08:04:16Z
2017-06-07T08:04:16Z 2014 |
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| Type |
Article
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| Identifier |
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 http://dspace.nbuv.gov.ua/handle/123456789/119522 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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