Titel
Angle-dependent Magnetoresistance of an Ordered Bose Glass of Vortices in YBa2Cu3O7-δ Thin Films with a Periodic Pinning Lattice
Autor*in
Autor*in
Max Karrer
Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen
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Abstract
The competition between intrinsic disorder in superconducting YBa2Cu3O7−𝛿 (YBCO) thin films and an ultradense triangular lattice of cylindrical pinning centers spaced at 30 nm intervals results in an ordered Bose glass phase of vortices. The samples were created by scanning the focused beam of a helium-ion microscope over the surface of the YBCO thin film to form columns of point defects where superconductivity was locally suppressed. The voltage–current isotherms reveal critical behavior and scale in the vicinity of the second-order glass transition. The latter exhibits a distinct peak in melting temperature (𝑇𝑔) vs. applied magnetic field (𝐵𝑎) at the magnetic commensurability field, along with a sharp rise in the lifetimes of glassy fluctuations. Angle-dependent magnetoresistance measurements in constant-Lorentz-force geometry unveil a strong increase in anisotropy compared to a pristine reference film where the density of vortices matches that of the columnar defects. The pinning is therefore, dominated by the magnetic-field component parallel to the columnar defects, exposing its one-dimensional character. These results support the idea of an ordered Bose glass phase.
Stichwort
copper-oxide superconductorsordered Bose glassvortex glassvortex matchingangular magnetoresistancevoltage–current isothermshelium-ion microscope
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
https://phaidra.univie.ac.at/o:2046413
Erschienen in
Titel
Condensed Matter
Band
8
Ausgabe
2
ISSN
2410-3896
Erscheinungsdatum
2023
Verlag
MDPI AG
Projektnummer
I4865-N – Austrian Science Fund (FWF)
Projektnummer
CA21144 – European Union (all programmes)
Projektnummer
CA19108 – European Union (all programmes)
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Erscheinungsdatum
2023
Zugänglichkeit
Rechteangabe
© 2023 by the authors

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