Topological Phases emerging from Spin-Orbital Physics

Abstract

We study the evolution of spin-orbital correlations in an inhomogeneous quantum system with an impurity replacing a doublon by a holon orbital degree of freedom. Spin-orbital entanglement is large when spin correlations are antiferromagnetic, while for a ferromagnetic host we obtain a pure orbital description. In this regime the orbital model can be mapped on spinless fermions and we uncover topological phases with zero energy modes at the edge or at the domain between magnetically inequivalent regions.

6 pages, 5 figures, submitted

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Cited by in corpus (8)

• Topological carbon materials: a new perspective
• Spin, orbital and topological order in models of strongly correlated electrons
• Thermodynamics of symmetric spin--orbital model: One- and two-dimensional cases
• Spin-orbital model of stoichiometric LaMnO${}_3$ with tetragonal distortions
• Lifshitz transitions in multi-band Hubbard models for topological superconductivity in complex quantum matter
• Spin-orbital mechanisms for negative thermal expansion in Ca2RuO${}_4$
• Tuning Crystal Field Potential by Orbital Dilution in $d^4$ Oxides
• Order in Quantum Compass and Orbital $e_g$ Models