Study of in-plane electrical transport anisotropy of a-axis oriented YBa2Cu3O7δ nanodevices

Reza Baghdadi, Riccardo Arpaia, Evgeny Stepantsov, Marco Arzeo, Dmitri Golubev, Domenico Montemurro, Eric Andersson, Thilo Bauch, and Floriana Lombardi
Phys. Rev. B 95, 184505 – Published 4 May 2017

Abstract

In the present work, we report the growth of fully untwinned high-quality a-axis-oriented YBa2Cu3O7δ films on (100) SrLaGaO4 substrates by using PrBa2Cu3O7δ as a buffer layer. We also fabricated nanowires at different angles γ with respect to the [0,1,0] direction of the substrate and studied the in-plane anisotropy of the critical current density, which we explained by considering the anisotropy in the coherence length ξ and London penetration depth λL. Finally, half-integer Shapiro-like steps measured in slightly underdoped c-axis oriented (γ=90) nanowires point towards a different transport regime, which could shed light on intriguing issues of high-critical-temperature superconductors.

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  • Received 8 February 2017

DOI:https://doi.org/10.1103/PhysRevB.95.184505

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Reza Baghdadi1, Riccardo Arpaia1, Evgeny Stepantsov2, Marco Arzeo1, Dmitri Golubev3, Domenico Montemurro1, Eric Andersson1, Thilo Bauch1, and Floriana Lombardi1,*

  • 1Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg, Sweden
  • 2Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow 119333, Russia
  • 3Low Temperature Laboratory (OVLL), Aalto University School of Science, P.O. Box 13500, FI-00076 Aalto, Finland

  • *floriana.lombardi@chalmers.se

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Vol. 95, Iss. 18 — 1 May 2017

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