Determination of coordinate dependence of a pinning potential from a microwave experiment with vortices

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dc.contributor.authorDobrovolskiy, O.V.
dc.contributor.authorV. A. Shklovskij, V.A.
dc.date.accessioned2013-10-04T09:31:31Z
dc.date.available2013-10-04T09:31:31Z
dc.date.issued2013-02
dc.description.abstractThe measurement of the complex impedance response accompanied by power absorption P(x) in the radiofrequency and microwave ranges represents a most popular experimental method for the investigation of pinning mechanisms and 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 T¼0K and exemplify how the coordinate dependence of a PP can be determined from a set of experimental curves P(xjj0) measured at subcritical dc currents 0<j0<jc under a small microwave excitation j1 jc with frequency x. We furthermore elucidate how and why the depinning frequency xp, which separates the non-dissipative (quasi-adiabatic) and the dissipative (high-frequency) regimes of small vortex oscillations in the PP, is reduced with increasing 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.ru_RU
dc.description.sponsorshipInstitute of Theoretical Physics, NSC-KIPT, Kharkiv 61108, Ukraine and Physical Department, Kharkiv National University, Kharkiv 61077, Ukraine Physikalisches Institut, Goethe-University, Frankfurt am Main 60438, Germanyru_RU
dc.identifier.citationFiz. Nizk. Temp. 39, 162–167ru_RU
dc.identifier.urihttps://ekhnuir.karazin.ua/handle/123456789/9090
dc.language.isoenru_RU
dc.publisherLOW TEMPERATURE PHYSICSru_RU
dc.subjectResearch Subject Categories::NATURAL SCIENCESru_RU
dc.titleDetermination of coordinate dependence of a pinning potential from a microwave experiment with vorticesru_RU
dc.typeArticleru_RU

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