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, <br /> Faculty of Physics, Hanoi University of Science,<br /> 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.

Downloads

Download data is not yet available.

Downloads

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., vol. 25, no. 3, p. 219, Nov. 2015.

Issue

Vol. 25 No. 3 (2015)

Section

Papers

License

Communications in Physics is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Copyright on any research article published in Communications in Physics is retained by the respective author(s), without restrictions. Authors grant VAST Journals System (VJS) a license to publish the article and identify itself as the original publisher. Upon author(s) by giving permission to Communications in Physics either via Communications in Physics portal or other channel to publish their research work in Communications in Physics agrees to all the terms and conditions of https://creativecommons.org/licenses/by-sa/4.0/ License and terms & condition set by VJS.