Charge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlattices

Handle URI:
http://hdl.handle.net/10754/625716
Title:
Charge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlattices
Authors:
Cossu, Fabrizio; Tahini, Hassan Ali ( 0000-0001-5454-0983 ) ; Singh, Nirpendra ( 0000-0001-8043-0403 ) ; Schwingenschlögl, Udo ( 0000-0003-4179-7231 )
Abstract:
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.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Cossu F, Tahini HA, Singh N, Schwingenschlögl U (2017) Charge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlattices. EPL (Europhysics Letters) 118: 57001. Available: http://dx.doi.org/10.1209/0295-5075/118/57001.
Publisher:
IOP Publishing
Journal:
EPL (Europhysics Letters)
Issue Date:
1-Aug-2017
DOI:
10.1209/0295-5075/118/57001
Type:
Article
ISSN:
0295-5075; 1286-4854
Sponsors:
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).
Additional Links:
http://iopscience.iop.org/article/10.1209/0295-5075/118/57001/meta
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCossu, Fabrizioen
dc.contributor.authorTahini, Hassan Alien
dc.contributor.authorSingh, Nirpendraen
dc.contributor.authorSchwingenschlögl, Udoen
dc.date.accessioned2017-10-03T12:49:35Z-
dc.date.available2017-10-03T12:49:35Z-
dc.date.issued2017-08-01en
dc.identifier.citationCossu F, Tahini HA, Singh N, Schwingenschlögl U (2017) Charge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlattices. EPL (Europhysics Letters) 118: 57001. Available: http://dx.doi.org/10.1209/0295-5075/118/57001.en
dc.identifier.issn0295-5075en
dc.identifier.issn1286-4854en
dc.identifier.doi10.1209/0295-5075/118/57001en
dc.identifier.urihttp://hdl.handle.net/10754/625716-
dc.description.abstractInterfaces 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.en
dc.description.sponsorshipThe 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).en
dc.publisherIOP Publishingen
dc.relation.urlhttp://iopscience.iop.org/article/10.1209/0295-5075/118/57001/metaen
dc.titleCharge driven metal-insulator transitions in LaMnO3|SrTiO3 (111) superlatticesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalEPL (Europhysics Letters)en
dc.contributor.institutionAsia Pacific Center for Theoretical Physics - Pohang, Gyeongbuk 790-784, Koreaen
dc.contributor.institutionIntegrated Materials Design Centre (IMDC), School of Chemical Engineering, UNSW Australia Sydney, NSW 2052, Australiaen
kaust.authorCossu, Fabrizioen
kaust.authorTahini, Hassan Alien
kaust.authorSingh, Nirpendraen
kaust.authorSchwingenschlögl, Udoen
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