TY - JOUR
T1 - Electronic Reconstruction in (LaVO3
)
m
/SrVO3
(
m
= 5, 6) Superlattices
AU - Dai, Qingqing
AU - Lüders, Ulrike
AU - Frésard, Raymond
AU - Eckern, Ulrich
AU - Schwingenschlögl, Udo
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). It was also supported by the German Science Foundation (DFG) through TRR 80.
PY - 2018/5/4
Y1 - 2018/5/4
N2 - The (LaV3+O3)m/SrV4+O3 (m = 5, 6) superlattices are investigated by first principles calculations. While bulk LaVO3 is a C-type antiferromagnetic semiconductor and bulk SrVO3 is a paramagnetic metal, semiconducting A-type antiferromagnetic states for both superlattices are found due to epitaxial strain. At the interfaces, however, the V spins couple antiferromagnetically for m = 5 and ferromagnetically for m = 6 (m-dependence of the magnetization). Electronic reconstruction in form of charge ordering is predicted to occur with V3+ and V4+ states arranged in a checkerboard pattern on both sides of the SrO layer. As compared to bulk LaVO3, the presence of V4+ ions introduces in-gap states that strongly reduce the bandgap and influence the orbital occupation and ordering.
AB - The (LaV3+O3)m/SrV4+O3 (m = 5, 6) superlattices are investigated by first principles calculations. While bulk LaVO3 is a C-type antiferromagnetic semiconductor and bulk SrVO3 is a paramagnetic metal, semiconducting A-type antiferromagnetic states for both superlattices are found due to epitaxial strain. At the interfaces, however, the V spins couple antiferromagnetically for m = 5 and ferromagnetically for m = 6 (m-dependence of the magnetization). Electronic reconstruction in form of charge ordering is predicted to occur with V3+ and V4+ states arranged in a checkerboard pattern on both sides of the SrO layer. As compared to bulk LaVO3, the presence of V4+ ions introduces in-gap states that strongly reduce the bandgap and influence the orbital occupation and ordering.
UR - http://hdl.handle.net/10754/627845
UR - https://onlinelibrary.wiley.com/doi/full/10.1002/admi.201701169
UR - http://www.scopus.com/inward/record.url?scp=85046459030&partnerID=8YFLogxK
U2 - 10.1002/admi.201701169
DO - 10.1002/admi.201701169
M3 - Article
SN - 2196-7350
VL - 5
SP - 1701169
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 12
ER -