On the ferromagnetic character of (LaVO$_3$)$_m$/SrVO$_3$ superlattices

Cosima Schuster; Ulrike Lueders; Udo Schwingenschloegl; Raymond Fresard

doi:10.1209/0295-5075/103/37003

paper

On the ferromagnetic character of (LaVO $_{3}$ ) $_{m}$ /SrVO $_{3}$ superlattices

arXiv:1211.2999 · doi:10.1209/0295-5075/103/37003

Abstract

The experimental observation that vanadate superlattices (LaVO $_{3}$ ) $_{m}$ /SrVO $_{3}$ show ferromagnetism up to room temperature [U.\ Lüders {\it et al.}, Phys.\ Rev.\ B {\bf 80}, 241102R (2009)] is investigated by means of density functional theory. First, the influence of the density functional on the electronic and magnetic structure of bulk $LaV O_{3}$ is discussed. Second, the band structure of a (LaVO $_{3}$ ) $_{m}$ /SrVO $_{3}$ slab for $m = 5$ and 6 is calculated. Very different behaviors for odd and even values of $m$ are found: In the odd case lattice relaxation results into a buckling of the interface VO $_{2}$ layers that leads to spin-polarized interfaces. In the even case a decoupling of the interface VO $_{2}$ layers from the LaO layers is obtained, confining the interface electrons into a two-dimensional electron gas. The orbital reconstruction at the interface due to the lattice relaxation is discussed.

8 pages, 7 figures

On the ferromagnetic character of (LaVO3​)m​/SrVO3​ superlattices

Abstract

References in corpus (4)

On the ferromagnetic character of (LaVO $_{3}$ ) $_{m}$ /SrVO $_{3}$ superlattices