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