Prediction of a spin-polarized two-dimensional electron gas at the LaAlO3/EuO(001) interface

Details Prediction of a spin-polarized two-dimensional electron gas at the LaAlO3/EuO(001) interface Prediction of a spin-polarized two-dimensional electron gas at the LaAlO3/EuO(001) interface

2009-03-27

arxiv.org/abs/0903.4874v1

Phys. Rev. B 79, 212408 (2009)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.79.212408

First-principles calculations predict the existence of a spin-polarized two-dimensional electron gas (2DEG) at the LaO/EuO interface in a LaAlO3/EuO (001) heterostructure. This polar interface favors electron doping into the Eu-5d conduction bands resulting in a 2DEG formed at the interface. Due to the exchange splitting of the Eu-5d states the 2DEG is spin-polarized below the Curie temperature of EuO. The predicted mechanism for the formation of a spinpolarized 2DEG at the interface between polar and ferromagnetic insulators may provide a robust magnetism of the 2DEG which is interesting for spintronics applications.

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