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Title: Topological phases in oxide heterostructures with light and heavy transition metal ions (invited)

Abstract

Using a combination of density functional theory, tight-binding models, and Hartree-Fock theory, we predict topological phases with and without time-reversal symmetry breaking in oxide heterostructures. We consider both heterostructures containing light transition metal ions and those containing heavy transition metal ions. We find that the (111) growth direction naturally leads to favorable conditions for topological phases in both perovskite structures and pyrochlore structures. For the case of light transition metal elements, Hartree-Fock theory predicts the spin-orbit coupling is effectively enhanced by on-site multiple-orbital interactions and may drive the system through a topological phase transition, while heavy elements with intrinsically large spin-orbit coupling require much weaker or even vanishing electron interactions to bring about a topological phase.

Authors:
 [1];  [2]
  1. Department of Physics, The University of Texas at Austin, Austin, Texas 78712 (United States)
  2. Theoretische Physik, ETH Zürich, CH-8093 Zürich (Switzerland)
Publication Date:
OSTI Identifier:
22402963
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTAL GROWTH; CRYSTAL STRUCTURE; DENSITY FUNCTIONAL METHOD; ELECTRONS; HARTREE-FOCK METHOD; HETEROJUNCTIONS; IONS; L-S COUPLING; OXIDES; PEROVSKITE; PHASE TRANSFORMATIONS; PYROCHLORE; SYMMETRY BREAKING; TOPOLOGY; TRANSITION ELEMENTS; VISIBLE RADIATION

Citation Formats

Fiete, Gregory A., E-mail: fiete@physics.utexas.edu, and Rüegg, Andreas. Topological phases in oxide heterostructures with light and heavy transition metal ions (invited). United States: N. p., 2015. Web. doi:10.1063/1.4913933.
Fiete, Gregory A., E-mail: fiete@physics.utexas.edu, & Rüegg, Andreas. Topological phases in oxide heterostructures with light and heavy transition metal ions (invited). United States. doi:10.1063/1.4913933.
Fiete, Gregory A., E-mail: fiete@physics.utexas.edu, and Rüegg, Andreas. Thu . "Topological phases in oxide heterostructures with light and heavy transition metal ions (invited)". United States. doi:10.1063/1.4913933.
@article{osti_22402963,
title = {Topological phases in oxide heterostructures with light and heavy transition metal ions (invited)},
author = {Fiete, Gregory A., E-mail: fiete@physics.utexas.edu and Rüegg, Andreas},
abstractNote = {Using a combination of density functional theory, tight-binding models, and Hartree-Fock theory, we predict topological phases with and without time-reversal symmetry breaking in oxide heterostructures. We consider both heterostructures containing light transition metal ions and those containing heavy transition metal ions. We find that the (111) growth direction naturally leads to favorable conditions for topological phases in both perovskite structures and pyrochlore structures. For the case of light transition metal elements, Hartree-Fock theory predicts the spin-orbit coupling is effectively enhanced by on-site multiple-orbital interactions and may drive the system through a topological phase transition, while heavy elements with intrinsically large spin-orbit coupling require much weaker or even vanishing electron interactions to bring about a topological phase.},
doi = {10.1063/1.4913933},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}