Quasiparticle Mass Enhancement and Fermi Surface Shape Modification in Oxide Two-Dimensional Electron Gases

Abstract

We propose a model intended to qualitatively capture the electron-electron interaction physics of two-dimensional electron gases formed near transition-metal oxide heterojunctions containing $t_{2g}$ electrons with a density much smaller than one electron per metal atom. Two-dimensional electron systems of this type can be described perturbatively using a $GW$ approximation which predicts that Coulomb interactions enhance quasiparticle effective masses more strongly than in simple two-dimensional electron gases, and that they reshape the Fermi surface, reducing its anisotropy.

14+1 pages, 7 figures

References in corpus (5)

• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Measurements of the density-dependent many-body electron mass in 2D GaAs/AlGaAs Heterostructures
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Structure and Correlation Effects in Semiconducting SrTiO${}_3$
• Dimer Mott Insulator in an Oxide Heterostructure

Cited by in corpus (9)

• Semiclassical theory of anisotropic transport at LaAlO3/SrTiO3 interfaces under in-plane magnetic field
• Plasmons at the LaAlO${}_3$/SrTiO${}_3$ interface and Graphene-LaAlO${}_3$/SrTiO${}_3$ double layer
• Transport in strongly-coupled graphene-LaAlO3/SrTiO3 hybrid systems
• Temperature-Dependent Band Structure of SrTiO${}_3$ Interfaces
• Anisotropic Fermionic Quasiparticles
• Electron mobility of a two-dimensional electron gas at the interface of SrTiO${}_3$ and LaAlO${}_3$
• Orbital and spin order in oxide two-dimensional electron gases
• Majorana zero modes in a quantum wire platform without Rashba spin-orbit coupling
• Fermi-surface topology and renormalization of bare ellipticity in an interacting anisotropic electron gas