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Disorder-controlled superconductivity at YBa2Cu3O7/SrTiO3 interfaces

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Garcia Barriocanal, Javier and Perez Muñoz, A.M. and Sefrioui, Zouhair and Arias, D. and Varela del Arco, María and León Yebra, Carlos and Pennycook, S.J. and Santamaría Sánchez-Barriga, Jacobo (2013) Disorder-controlled superconductivity at YBa2Cu3O7/SrTiO3 interfaces. Physical Review B, 87 . ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v87/i24/e245105



Abstract

We examine the effect of interface disorder in suppressing superconductivity in coherently grown ultrathin
YBa2Cu3O7 (YBCO) layers on SrTiO3 (STO) in YBCO/STO superlattices. The termination plane of the STO
is TiO2 and the CuO chains are missing at the interface. Disorder (steps) at the STO interface cause alterations
of the stacking sequence of the intracell YBCO atomic layers. Stacking faults give rise to antiphase boundaries
which break the continuity of the CuO2 planes and depress superconductivity. We show that superconductivity
is directly controlled by interface disorder outlining the importance of pair breaking and localization by disorder
in ultrathin layers.


Item Type:Article
Uncontrolled Keywords:Superconductivity
Subjects:Sciences > Physics > Solid state physics
ID Code:22160
Deposited On:12 Jul 2013 10:56
Last Modified:10 Dec 2018 14:58

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