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

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

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

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Papers