Magnetism in the Interfaces of the Sandwiched PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\) Hetero-structure

Bach Huong Giang; Nguyen Thuy Trang; Tran Van Nam; Bach Thanh Cong

doi:10.15625/0868-3166/25/3/4423

Magnetism in the Interfaces of the Sandwiched PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\) Hetero-structure

Bach Huong Giang, Nguyen Thuy Trang, Tran Van Nam, Bach Thanh Cong

Author affiliations

Authors

Bach Huong Giang Computational Material Science Lab, Faculty of Physics, Hanoi University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
Nguyen Thuy Trang
Tran Van Nam
Bach Thanh Cong

DOI:

https://doi.org/10.15625/0868-3166/25/3/4423

Keywords:

Magnetism, LaAlO\(_3\)/SrTiO\(_3\), PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\).

Abstract

We investigate the effect of PbTiO3 on the LaAlO\(_3\)/SrTiO\(_3\) hetero-structure by density functional theory, where the asymmetry
sandwich not only forms a quasi-two dimensional electron gas but also reveals a ferromagnetic state in the TiO\(_2\) interfaces. It
is found out that magnetic moments of TiO\(_2\) interface layers are around 0.18 \(\mu_B\) while they are mostly negligible in the pure LaAlO\(_3\)/SrTiO\(_3\) system. Even though magnetic moments are mainly produced by Ti t2g orbitals, oxygen plays a key role in the formation of the ferromagnetic state since polar distortions primarily occur in oxygen positions of the SrTiO\(_3\) and PbTiO\(_3\) sides in opposite directions.

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Published

24-11-2015

How to Cite

[1]

B. H. Giang, N. T. Trang, T. V. Nam and B. T. Cong, Magnetism in the Interfaces of the Sandwiched PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\) Hetero-structure, Comm. Phys. 25 (2015) 219. DOI: https://doi.org/10.15625/0868-3166/25/3/4423.

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Issue

Vol. 25 No. 3 (2015)

Section

Papers

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