Strain-induced topological phase transition at (111) SrTiO${}_3$-based heterostructures

Abstract

The quasi-two-dimensional electronic gas at the (111) SrTiO${}_3$-based heterostructure interfaces is described by a multi-band tight-binding model providing electronic bands in agreement at low energies with photoemission experiments. We analyze both the roles of the spin-orbit coupling and of the trigonal crystal field effects. We point out the presence of a regime with sizable strain where the band structure exhibits a Dirac cone whose features are consistent with \textit{ab-initio} approaches. The combined effect of spin-orbit coupling and trigonal strain gives rise to non-trivial spin and orbital angular momenta patterns in the Brillouin zone and to quantum spin Hall effect by opening a gap at the Dirac cone. The system can switch from a conducting to a topological insulating state \textit{via} modification of trigonal strain within a parameter range which is estimated to be experimentally achievable.

arXiv comment19 pages, 20 figures

References in corpus (50)

• Quantum Spin Hall Effect in Graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Berry Phase Effects on Electronic Properties
• Topological Insulators in Three Dimensions
• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological invariants of time-reversal-invariant band structures
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Tunable Rashba spin-orbit interaction at oxide interfaces
• Computing topological invariants without inversion symmetry
• Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures
• Wannier representation of Z_2 topological insulators
• Oxide spintronics
• Physics of SrTiO${}_3$-based heterostructures and nanostructures: a review
• Majorana Zero Modes in 1D Quantum Wires Without Long-Ranged Superconducting Order
• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• Evidence for a strain tuned topological phase transition in ZrTe5
• Orbital Hall effect as an alternative to valley Hall effect in gapped graphene
• Topological superconductivity and unconventional pairing in oxide interfaces
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Observation of out-of-plane spin texture in a SrTiO3 (111) two-dimensional electron gas
• Massive symmetry breaking in LaAlO${}_3$/SrTiO${}_3$(111) quantum wells: a three-orbital, strongly correlated generalization of graphene
• Spin--orbital interaction for face-sharing octahedra: Realization of a highly symmetric SU(4) model
• Two-dimensional superconductivity at the (111)LaAlO${}_3$/SrTiO${}_3$ interface
• Orientational tuning of the Fermi sea of confined electrons at the SrTiO3 (110) and (111) surfaces
• Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO${}_3$/SrTiO${}_3$ oxide interface
• Role of local geometry in spin and orbital structure of transition metal compounds
• Magnetic and Superconducting Ordering at LaAlO3/SrTiO3 Interfaces
• Modelling of strain effects in manganite films
• Topological states at the (001) surface of SrTiO3
• Route to Topological Superconductivity via Magnetic Field Rotation
• Perspective: Strongly correlated and topological states in [111] grown transition metal oxide thin films and heterostructures
• Topological superconductivity and Majorana bound states at the LaAlO${}_3$/SrTiO${}_3$ interface
• Inter-orbital topological superconductivity in spin-orbit coupled superconductors with inversion symmetry breaking
• Self-formed $LaAl{O}_3/SrTi{O}_3$ Micro-Membranes
• Band inversion driven by electronic correlations at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Evolution of topological superconductivity by orbital selective confinement in oxide nanowires
• Symmetry and correlation effects on band structure explain the anomalous transport properties of (111) LaAlO${}_3$/SrTiO${}_3$
• Symmetry breaking at the (111) interfaces of SrTiO${}_3$ hosting a 2D-electron system
• Magnetoresistance in the superconducting state at the (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Perovskite oxide heterojunction for Rashba-Dresselhaus assisted antiferromagnetic spintronics
• Strain-induced topological transition in SrRu${}_2$O${}_6$ and CaOs${}_2$O${}_6$
• Magnetic and nematic orders of the 2DEG at oxide (111) surfaces and interfaces
• Effect of Coulomb interaction on the gap in monolayer and bilayer graphene
• Ferroelectricity in [111]-oriented epitaxially strained SrTiO${}_3$ from first principles
• Plasmons in topological insulator cylindrical nanowires
• Spin-orbital polarization of Majorana edge states in oxides nanowires
• Electron-lattice and strain effects in manganite heterostructures: the case of a single interface

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• Effect of confinement and Coulomb interactions on the electronic structure of (111) LaAlO${}_3$/SrTiO${}_3$ interface
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