Die u:cris Detailansicht:

Transverse vortex commensurability effect and sign change of the Hall voltage in superconducting YBa2Cu3O7−δ thin films with a nanoscale periodic pinning landscape

Autor(en)
Georg Zechner, Wolfgang Lang, Meirzhan Dosmailov, Marius A. Bodea, Johannes D. Pedarnig
Abstrakt

The transverse (Hall) voltage in thin films of the high-temperature superconductor YBa2Cu3O7−δ with an artificial periodic pinning array is investigated. Columnar defect regions along the crystallographic c axis, in which superconductivity is suppressed, are created by irradiation with He+ ions through a silicon stencil mask. The commensurate arrangement of magnetic flux quanta with the artificial defect lattice is confirmed by maxima of the critical current and minima of the resistance, respectively. The magnetic field dependence of the transverse voltage reveals a commensurability effect characterized by a narrow peak of the Hall coefficient with reversed polarity compared to the background signal. This signature of vortex matching disappears at larger vortex velocities substantiating its close connection with enhanced pinning of vortices at the periodic pinning landscape.

Organisation(en)
Elektronische Materialeigenschaften
Externe Organisation(en)
Johannes Kepler Universität Linz
Journal
Physical Review B
Band
98
Anzahl der Seiten
8
ISSN
2469-9950
DOI
https://doi.org/10.1103/PhysRevB.98.104508
Publikationsdatum
09-2018
Peer-reviewed
Ja
ÖFOS 2012
210003 Nanoelektronik, 103013 Ionenphysik, 103033 Supraleitung, 103009 Festkörperphysik
Schlagwörter
ASJC Scopus Sachgebiete
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/a4364273-1bc7-44aa-bce1-258f6a03140c