Imaging the anisotropic nonlinear meissner effect in nodal YBa2 Cu3 O7-Î´ thin-film superconductors.

Zhuravel, Alexander P; Ghamsari, B G; Kurter, C; Jung, P; Remillard, S; Abrahams, J; Lukashenko, A V; Ustinov, Alexey V; Anlage, Steven M

Zhuravel, Alexander P; Ghamsari, B G; Kurter, C; Jung, P; Remillard, S; Abrahams, J; Lukashenko, A V; Ustinov, Alexey V; Anlage, Steven M.

Afiliación

Zhuravel AP; B Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, UA-61103 Kharkov, Ukraine.

Phys Rev Lett ; 110(8): 087002, 2013 Feb 22.

Article en En | MEDLINE | ID: mdl-23473189

RESUMEN

We have directly imaged the anisotropic nonlinear Meissner effect in an unconventional superconductor through the nonlinear electrodynamic response of both (bulk) gap nodes and (surface) Andreev bound states. A superconducting thin film is patterned into a compact self-resonant spiral structure, excited near resonance in the radio-frequency range, and scanned with a focused laser beam perturbation. At low temperatures, direction-dependent nonlinearities in the reactive and resistive properties of the resonator create photoresponse that maps out the directions of nodes, or of bound states associated with these nodes, on the Fermi surface of the superconductor. The method is demonstrated on the nodal superconductor YBa2Cu3O7-Î´ and the results are consistent with theoretical predictions for the bulk and surface contributions.

Buscar en Google

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2013 Tipo del documento: Article País de afiliación: Ucrania Pais de publicación: Estados Unidos

Buscar en Google

Añadir a Mi BVS

Imprimir

XML

PubMed Links