Title: The unconventional doping in YBa2Cu3O7-x/La0.7Ca0.3MnO3 heterostructures by termination control
Authors: Tra, V. T.
Huang, R.
Gao, X.
Chen, Y. -J.
Liu, Y. T.
Kuo, W. C.
Chin, Y. Y.
Lin, H. J.
Chen, J. M.
Lee, J. M.
Lee, J. F.
Shi, P. S.
Jiang, M. G.
Duan, C. G.
Juang, J. Y.
Chen, C. T.
Jeng, H. T.
He, Q.
Chuang, Y. -D.
Lin, J. -Y.
Chu, Y. -H.
Department of Materials Science and Engineering
Institute of Physics
College of Electrical and Computer Engineering
Issue Date: 16-Jan-2017
Abstract: In strongly correlated oxides, heterostructures provide a powerful route to manipulate the charge, spin, orbital, and lattice degrees of freedom to create distinctive functionalities. In this work, we have achieved atomically precise interface control in YBa2Cu3O7-x/La0.7Ca0.3MnO3 (YBCO/LCMO) heterostructures and find a hidden effective doping. This mechanism is responsible for higher Tc in the sample with the MnO2-terminated interface than in that with the La0.7Ca0.3O-terminated interface. The MnO2-terminated sample also shows a larger magnetic moment of Mn together with a lower valence state. For more than a decade, the control of T-c in these heterostructures prior to this work has been solely via the variation of YBCO or LCMO thickness. This work hints at an alternative way of exploiting and exploring the interactions between superconductivity and magnetism in this system. Published by AIP Publishing.
URI: http://dx.doi.org/10.1063/1.4973996
ISSN: 0003-6951
DOI: 10.1063/1.4973996
Volume: 110
Issue: 3
Appears in Collections:Articles