TY - JOUR
T1 - Charge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlattices
AU - Cossu, Fabrizio
AU - Tahini, Hassan Ali
AU - Singh, Nirpendra
AU - Schwingenschlögl, Udo
N1 - KAUST Repository Item: Exported on 2020-04-23
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). We would like to thank V. Eyert and I. di Marco for fruitful discussions. FC was also supported through NRF funded by MSIP of Korea (2015R1C1A1A01052411 and 2017R1D1A1B03033465).
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Interfaces of perovskite oxides, due to the strong interplay between the lattice, charge and spin degrees of freedom, can host various phase transitions, which is particularly interesting if these transitions can be tuned by external fields. Recently, ferromagnetism was found together with a seemingly insulating state in superlattices of manganites and titanates. We therefore study the (111) oriented $(\text{LaMnO}_3)_{6-x}\vert(\text{SrTiO}_3)_{6+x}~(x = -0.5, 0, 0.5)$ superlattices by means of ab initio calculations, predicting a ferromagnetic ground state due to double exchange in all cases. We shed light on the ferromagnetic coupling in the LaMnO3 region and at the interfaces. The insulating states of specific superlattices can be understood on the basis of Jahn-Teller modes and electron/hole doping.
AB - Interfaces of perovskite oxides, due to the strong interplay between the lattice, charge and spin degrees of freedom, can host various phase transitions, which is particularly interesting if these transitions can be tuned by external fields. Recently, ferromagnetism was found together with a seemingly insulating state in superlattices of manganites and titanates. We therefore study the (111) oriented $(\text{LaMnO}_3)_{6-x}\vert(\text{SrTiO}_3)_{6+x}~(x = -0.5, 0, 0.5)$ superlattices by means of ab initio calculations, predicting a ferromagnetic ground state due to double exchange in all cases. We shed light on the ferromagnetic coupling in the LaMnO3 region and at the interfaces. The insulating states of specific superlattices can be understood on the basis of Jahn-Teller modes and electron/hole doping.
UR - http://hdl.handle.net/10754/625716
UR - http://iopscience.iop.org/article/10.1209/0295-5075/118/57001/meta
UR - http://www.scopus.com/inward/record.url?scp=85028688271&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/118/57001
DO - 10.1209/0295-5075/118/57001
M3 - Article
AN - SCOPUS:85028688271
SN - 0295-5075
VL - 118
JO - EPL (Europhysics Letters)
JF - EPL (Europhysics Letters)
IS - 5
ER -