Determination of the coordinate dependence of a pinning potential from the microwave experiment with vortices
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Determination of the coordinate dependence of a pinning potential from the microwave experiment with vortices
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| Creator |
Shklovskij, V.A.
Dobrovolskiy, O.V. |
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| Subject |
Свеpхпpоводимость, в том числе высокотемпеpатуpная
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| Description |
The measurement of the complex impedance response and accompanied power absorption P(ω) in the radiofrequency and microwave ranges represents a most popular experimental method to investigate pinning mechanisms and the vortex dynamics in type-II superconductors. In the theory, the pinning potential (PP) well for a vortex must be a priori specified in order to subsequently analyze the measured data. We have theoretically solved the inverse problem at T = 0 K and exemplify how the coordinate dependence of a PP can be determined from a set of experimental curves P(ω|j₀) measured at subcritical dc currents 0 < j₀ < jc under a small microwave excitation j₁ << jc with frequency ω. We furthermore elucidate how and why the depinning frequency ωp, which separates the non-dissipative (quasi-adiabatic) and the dissipative (high-frequency) regimes of small vortex oscillations in the PP, is reduced with the increase of j₀. The results can be directly applied to a wide range of conventional superconductors with a PP subjected to superimposed dc and small microwave ac currents at T << Tc.
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| Date |
2017-05-29T14:21:05Z
2017-05-29T14:21:05Z 2013 |
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| Type |
Article
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| Identifier |
Determination of the coordinate dependence of a pinning
potential from the microwave experiment with vortices / V.A. Shklovskij, O.V. Dobrovolskiy // Физика низких температур. — 2013. — Т. 39, № 2. — С. 162–167. — Бібліогр.: 20 назв. — англ.
0132-6414 PACS: 74.25.Wx, 74.25.F–, 74.25.nn http://dspace.nbuv.gov.ua/handle/123456789/118260 |
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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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