Magnetism in the Interfaces of the Sandwiched PbTiO3/LaAlO3/SrTiO3 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, LaAlO3/SrTiO3, PbTiO3/LaAlO3/SrTiO3.

Abstract

We investigate the effect of PbTiO3 on the LaAlO3/SrTiO3 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 TiO2 interfaces. It
is found out that magnetic moments of TiO2 interface layers are around 0.18 μB while they are mostly negligible in the pure LaAlO3/SrTiO3 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 SrTiO3 and PbTiO3 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 PbTiO3/LaAlO3/SrTiO3 Hetero-structure”, Comm. Phys., vol. 25, no. 3, p. 219, Nov. 2015.

Issue

Vol. 25 No. 3 (2015)

Section

Papers

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Received 11-08-2014
Published 24-11-2015