Possible Mechanisms of Electronic Phase Separation in Oxide Interfaces
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- 作者：N. Bovenzi (1)
F. Finocchiaro (1)
N. Scopigno (1)
D. Bucheli (1)
S. Caprara (1)
G. Seibold (2)
M. Grilli (1)
1. Dipartimento di Fisica ; Universit脿 di Roma Sapienza ; Piazzale Aldo Moro 5 ; 00185 ; Roma ; Italy
2. Institut f眉r Physik ; BTU Cottbus-Senftenberg ; P.O. Box 101344 ; 03013 ; Cottbus ; Germany - 关键词：Oxide interfaces ; Superconductivity ; Electronic phase separation
- 刊名：Journal of Superconductivity Incorporating Novel Magnetism
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：28
- 期：4
- 页码：1273-1277
- 全文大小：413 KB
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23. Bovenzi, N., Bucheli, D., Caprara, S., Scopigno, N., Seibold, G., Grilli, M.: in preparation
24. Finocchiaro, F., Bucheli, D., Caprara, S., Seibold, G., Grilli, M.: in preparation
25. Scopigno, N., Bucheli, D., Caprara, S., Biscaras, J., Bergeal, N., Lesueur, J., Grilli, M.: in preparation - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Superconductivity, Superfluidity and Quantum Fluids
Magnetism and Magnetic Materials
Condensed Matter
Characterization and Evaluation Materials - 出版者：Springer New York
- ISSN：1557-1947
文摘
LaAlO 3/SrTiO 3 and LaTiO 3/SrTiO 3 (LXO / STO) interfaces are known to host a strongly inhomogeneous (nearly) two-dimensional electron gas (2DEG). In this work, we present three unconventional electronic mechanisms of electronic phase separation (EPS) in a 2DEG as a possible source of inhomogeneity in oxide interfaces. Common to all three mechanisms is the dependence of some (interaction) potential on the 2DEGs density. We first consider a mechanism resulting from a sizable density-dependent Rashba spin-orbit coupling. Next, we point out that an EPS may also occur in the case of a density-dependent superconducting pairing interaction. Finally, we show that the confinement of the 2DEG to the interface by a density-dependent, self-consistent electrostatic potential can by itself cause an EPS.