Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface

Details Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface

2010-12-04

arxiv.org/abs/1012.0889v1

Physics

Condensed Matter

Materials Science

7 pages, 10 figures

Scientific paper

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.

Affiliated with

Also associated with

No associations

Rating

Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic Phases and Phase Separation in the Hubbard-Holstein Model of a Polar Interface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-99206