Lattice relaxation and ferromagnetic character of $(LaVO_{3})_{m}/SrVO_{3}$ superlattices

Cosima B. Schuster, Ulrike Lüders, Raymond Frésard, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The experimental observation that vanadate superlattices (LaVO 3)m/SrVO3 show ferromagnetism up to room temperature (Lüders U. et al., Phys. Rev. B, 80 (2009) 241102(R)) is investigated by means of density functional theory, and the band structure for m = 5 and 6 is calculated. A buckling of the interface VO2 layers is found in both cases, but subtle differences in bond length lead to very different properties for even and odd values of m: in the even case, the two interface VO2 layers effectively decouple from the adjacent LaO layers due to a strong bond length enhancement. This results into a local inversion of the orbital occupancy and to the confinement of the charge carriers. In the odd case, the amplitude of the bond length variation is smaller, so that the charge carriers spill into the deeper-lying VO2 layers, and spin-polarised interfaces are obtained. © Copyright EPLA, 2013.
Original languageEnglish (US)
Pages (from-to)37003
JournalEPL (Europhysics Letters)
Volume103
Issue number3
DOIs
StatePublished - Aug 13 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Lattice relaxation and ferromagnetic character of $(LaVO_{3})_{m}/SrVO_{3}$ superlattices'. Together they form a unique fingerprint.

Cite this