##### URI
http://hdl.handle.net/10355/9310
 dc.contributor.author Nanda, B. R. K. eng dc.contributor.author Satpathy, Sashi Sekhar, 1956- eng dc.date.issued 2010 eng dc.description http://arxiv.org/abs/1012.0889 eng dc.description.abstract From a mean-field solution of the Hubbard-Holstein model, we show that a rich variety of different electronic phases can result at the interface between two polar materials such as LaAlO$_3$/SrTiO$_3$. Depending on the strengths of the various competing interactions, viz., the electronic kinetic energy, electron-phonon interaction, Coulomb energy, and electronic screening strength, the electrons could (i) either be strongly confined to the interface forming a 2D metallic or an insulating phase, (ii) spread deeper into the bulk making a 3D phase, or (iii) become localized at individual sites forming a Jahn-Teller polaronic phase. In the polaronic phase, the Coulomb interaction could lead to unpaired electrons resulting in magnetic Kondo centers. Under appropriate conditions, electronic phase separation may also occur resulting in the coexistence of metallic and insulating regions at the interface. eng dc.description.sponsorship This work was supported by the U. S. Department of Energy through Grant No. DE-FG02-00ER45818. eng dc.identifier.citation arXiv:1012.0889v1 eng dc.identifier.uri http://hdl.handle.net/10355/9310 eng dc.language English eng dc.publisher arXiv eng dc.relation.ispartofcollection University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications eng dc.subject electronic phases eng dc.subject.lcsh Condensed matter eng dc.subject.lcsh Materials science eng dc.title Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface eng dc.type Article eng
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