Publication: Effect of polaron formation on electronic, charge and magnetic properties of Nb12O29
Дата
2020
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© 2019 Elsevier B.V.We present the ab initio study of different phases of Nb12O29, which has been done in the framework of density functional theory using the onsite Hubbard-U correction applied to the Nb-d states. We vary the U parameter in between 0 and 7 eV and suggest U = 3.7–5.0 eV to be most appropriate for the description of Nb12O29. We show that one cannot get any adequate description of this oxide using the crystallographic unit cell but at least 3 times larger supercell is needed increased along the shortest lattice parameter b to accommodate lattice distortions associated with polaron formation. Our results obtained for the enlarged cells show the possibility of simultaneous co-existence of localized states (polaron formation) and delocalized states providing metal-like properties of Nb12O29, in qualitative agreement with available experimental data.
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Effect of polaron formation on electronic, charge and magnetic properties of Nb12O29 / Filonov, A.B. [et al.] // Journal of Alloys and Compounds. - 2020. - 821. - 10.1016/j.jallcom.2019.153527
URI
https://www.doi.org/10.1016/j.jallcom.2019.153527
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https://openrepository.mephi.ru/handle/123456789/20093
https://www.scopus.com/record/display.uri?eid=2-s2.0-85076977021&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000512369200045
https://openrepository.mephi.ru/handle/123456789/20093