Study of in-plane electrical transport anisotropy of a -axis oriented YBa2Cu3O7−δ nanodevices

Reza Baghdadi, Riccardo Arpaia, Evgeny Stepantsov, Marco Arzeo, Dmitri Golubev, Domenico Montemurro, Eric Andersson, Thilo Bauch, Floriana Lombardi
2017 Physical review B  
In the present work, we report the growth of fully untwinned high-quality a-axis-oriented YBa 2 Cu 3 O 7−δ films on (100) SrLaGaO 4 substrates by using PrBa 2 Cu 3 O 7−δ 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 λ L . Finally, half-integer
more » ... iro-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.
doi:10.1103/physrevb.95.184505 fatcat:3gcw54majbamreb7vsj6gts3su