Anomalous mass enhancement in strongly-correlated quantum wells

Abstract

Using dynamical-mean-field theory, we investigate the electronic properties of quantum wells consisting of a $t_{2g}^1$-electron system with strong correlations. The special focus is on the subband structure of such quantum wells. The effective mass is found to increase with increase in the value of the bottom of the subband, i.e., decrease in the subband occupation number. This is due to the combination of Coulomb repulsion, whose effect is enhanced on surface layers, and longer-range hoppings. We discuss the implication of these results for the recent angle-resolved photoemission experiment on SrVO${}_3$ thin films.

6 pages, 7 figures including supplementary material

References in corpus (4)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattice
• Exact Diagonalization Dynamical Mean Field Theory for Multi-Band Materials: Effect of Coulomb correlations on the Fermi surface of Na_0.3CoO_2
• Strongly renormalized quasi-two-dimensional electron gas in a heterostructure with correlation effects

Cited by in corpus (13)

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• Metal-insulator transition and orbital reconstruction in Mott quantum wells of NdNiO${}_3$
• Origin of the anomalous mass renormalization in metallic quantum well states of correlated oxide SrVO${}_3$
• Correlated electronic states of SrVO3 revealed by angle-resolved photoemission spectroscopy
• Correlation effects in pyrochlore iridate thin films grown along the $[111]$ direction
• Dynamical mean-field theory of indirect magnetic exchange
• Metal-insulator transition in CaVO${}_3$ thin films: interplay between epitaxial strain, dimensional confinement, and surface effects
• Quantum Confinement Induced Metal-Insulator Transition in Strongly Correlated Quantum Wells of SrVO${}_3$ Superlattice
• Charge redistribution in correlated heterostuctures within nonequilibrium real-space dynamical mean-field theory
• Resonance Effects in Correlated Multilayer Heterostructures
• Spectral changes in layered $f$-electron systems induced by Kondo hole substitution in the boundary-layer
• Oxide Heterostructures from a Realistic Many-Body Perspective