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arXiv · 0903.4874

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

Yong Wang·Manish K. Niranjan·J. D. Burton·Joonhee M. An·Kirill D. Belashchenko·Evgeny Y. Tsymbal
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Abstract

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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Yong Wang, Manish K. Niranjan, J. D. Burton, Joonhee M. An, Kirill D. Belashchenko, Evgeny Y. Tsymbal. 2009-03-27. Prediction of a spin-polarized two-dimensional electron gas at the LaAlO3/EuO(001) interface. https://doi.org/10.1103/physrevb.79.212408

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