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- W3207598629 abstract "The quasi-two-dimensional electronic gas at the (111) ${mathrm{SrTiO}}_{3}$-based heterostructure interfaces is described by a multiband 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 ab initio approaches. The combined effect of spin-orbit coupling and trigonal strain gives rise to nontrivial 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 via modification of trigonal strain within a parameter range which is estimated to be experimentally achievable." @default.
- W3207598629 created "2021-10-25" @default.
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- W3207598629 date "2021-10-14" @default.
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- W3207598629 title "Strain-induced topological phase transition at (111) <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> -based heterostructures" @default.
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- W3207598629 doi "https://doi.org/10.1103/physrevresearch.3.043038" @default.
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