School of Physics and Astronomy, Tel Aviv University, 69978, Tel Aviv, Israel

报告摘要：
The two dimensional electron liquid formed at the (111) interface between SrTiO3 andLaAlO3 is a laboratory for studying electronic properties in tunable correlated hexagonalsystems.Symmetry changes imposed by the interface and by various structural transitions in the bulkcan affect the electronic properties at the interface. In addition, this system can be smoothly tuned from the superconductor to the insulator regime.The normal state properties of the (111) LaAlO3/SrTiO3 interface are indicative of contributions from electron-type and hole-type charge carriers. The latter are also consistent with the polar structure of this interface. Upon applying gate voltage to add electrons, a band with a higher spin state gets populated, resulting in a six-fold anisotropic magnetoresistance [1]. Superconductivity is observed in a dome-shaped region in the carrier density – temperature phase diagram. The upper critical field is strongly anisotropic and exceeds the Clogston-Chandrasekhar limit. This suggests strong spin-orbit interaction eso. Surprisingly, eso is also nonmonotonic as a function of gate voltage as found both from analysis of the superconducting properties and of the weak antilocalization measurements [2]. Finally, the nature of the transition from superconductor to insulator will be discussed in the framework of a quantum phase transitions in an electronically disordered two-dimensional superconducting system [3].
[1] P.K. Rout, I. Agireen, E. Maniv, M. Goldstein, Y. Dagan Physical Review B 95 (24), 241107
[2] P.K. Rout, E. Maniv, Y. Dagan, arXiv preprint arXiv:1706.01717
[3] M. Mograbi et al. To be published

报告人简介：
Short Biography: PhD- 2001 Tel Aviv University; 2001-2005 Research Associate, University of Maryland –College Park (with R. L. Greene); 2005-2009 Senior Lecturer and Associate Professor, Tel Aviv University; 2015-Today Professor, Tel Aviv University. Research interest: superconductivity, strongly correlated materials, oxide-interfaces.

联系人：金魁/ 8264-9729