Transverse acousto-electric effect in superconductors

0462662 - FZÚ 2017 RIV NL eng J - Článek v odborném periodiku
Lipavský, P. - Koláček, Jan - Lin, P.-J.
Transverse acousto-electric effect in superconductors.
Physica. C. Roč. 525, Jun (2016), 10-17. ISSN 0921-4534. E-ISSN 1873-2143
Grant CEP: GA MŠMT(CZ) LD14060
Institucionální podpora: RVO:68378271
Klíčová slova: superconductivity * acousto-electric effect * Abrikosov vortex * Tolman–Stewart effect
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.404, rok: 2016

We formulate a theory based on the time-dependent Ginzburg–Landau (TDGL) theory and Newtonian vortex dynamics to study the transverse acousto-electric response of a type-II superconductor with Abrikosov vortex lattice. When exposed to a transverse acoustic wave, Cooper pairs emerge from the moving atomic lattice and moving electrons. As in the Tolman–Stewart effect in a normal metal, an electromagnetic field is radiated from the superconductor. We adapt the equilibrium-based TDGL theory to this non-equilibrium system by using a floating condensation kernel. Due to the interaction between nor- mal and superconducting components, the radiated electric field as a function of magnetic field attains a maximum value occurring below the upper critical magnetic field. This local increase in electric field has weak temperature dependence and is suppressed by the presence of impurities in the superconductor.
Trvalý link: http://hdl.handle.net/11104/0262049