TY - JOUR AU - Giang, Bach Huong AU - Trang, Nguyen Thuy AU - Nam, Tran Van AU - Cong, Bach Thanh PY - 2015/11/24 Y2 - 2024/03/29 TI - Magnetism in the Interfaces of the Sandwiched PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\) Hetero-structure JF - Communications in Physics JA - Comm. Phys. VL - 25 IS - 3 SE - Papers DO - 10.15625/0868-3166/25/3/4423 UR - https://vjs.ac.vn/index.php/cip/article/view/4423 SP - 219 AB - We investigate the effect of PbTiO3 on the LaAlO\(_3\)/SrTiO\(_3\) hetero-structure by density functional theory, where the asymmetry<br />sandwich not only forms a quasi-two dimensional electron gas but also reveals a ferromagnetic state in the TiO\(_2\) interfaces. It<br />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. ER -