Study of in-plane electrical transport anisotropy of a -axis oriented YBa2Cu3 O7-δ nanodevices

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017-05-04
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Language
en
Pages
1-7
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Physical Review B, Volume 95, issue 18
Abstract
In the present work, we report the growth of fully untwinned high-quality a-axis-oriented YBa2Cu3O7-δ films on (100) SrLaGaO4 substrates by using PrBa2Cu3O7-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 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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Baghdadi , R , Arpaia , R , Stepantsov , E , Arzeo , M , Golubev , D , Montemurro , D , Andersson , E , Bauch , T & Lombardi , F 2017 , ' Study of in-plane electrical transport anisotropy of a -axis oriented YBa2Cu3 O7-δ nanodevices ' , Physical Review B , vol. 95 , no. 18 , 184505 , pp. 1-7 . https://doi.org/10.1103/PhysRevB.95.184505