TY - JOUR
T1 - Lattice relaxation and ferromagnetic character of $(LaVO_{3})_{m}/SrVO_{3}$ superlattices
AU - Schuster, Cosima B.
AU - Lüders, Ulrike
AU - Frésard, Raymond
AU - Schwingenschlögl, Udo
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We thank S. NAZIR and T. KOPP for valuable discussions. Financial support by the German Research Foundation within TRR 80 (CS) and by the ANR through GeCoDo-ANR-2011-JS0800101 (UL and RF) is acknowledged. UL and RF thank the Region Basse-Normandie and the Ministere de la Recherche for financial support.
PY - 2013/8/13
Y1 - 2013/8/13
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/562895
UR - https://iopscience.iop.org/article/10.1209/0295-5075/103/37003
UR - http://www.scopus.com/inward/record.url?scp=84884547227&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/103/37003
DO - 10.1209/0295-5075/103/37003
M3 - Article
SN - 0295-5075
VL - 103
SP - 37003
JO - EPL (Europhysics Letters)
JF - EPL (Europhysics Letters)
IS - 3
ER -