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- W2247451755 abstract "We present analysis of a single channel interacting quantum wire problem in the presence of spin-orbit interaction. The spin-orbit coupling breaks the spin-rotational symmetry from SU(2) to U(1) and breaks inversion symmetry. The low-energy theory is then a two band model with a difference of Fermi velocities $delta v$. Using bosonization and a two-loop renormalization group procedure we show that electron-electron interactions can open a gap in the spin sector of the theory when the interaction strength $U$ is smaller than $delta v$ in appropriate units. For repulsive interactions, the resulting strong coupling phase is of the spin-density-wave type. We show that this phase has peculiar emergent topological properties. The gapped spin sector behaves as a topological insulator, with zero-energy edge modes with fractional spin. On the other hand, the charge sector remains critical, meaning the entire system is metallic. However, this bulk electron liquid as a whole exhibits properties commonly associated with the one-dimensional edge states of two-dimensional spin-Hall insulators, in particular, the conduction of $2e^2/h$ is robust against nonmagnetic impurities." @default.
- W2247451755 created "2016-06-24" @default.
- W2247451755 creator A5009074904 @default.
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- W2247451755 date "2015-07-21" @default.
- W2247451755 modified "2023-09-23" @default.
- W2247451755 title "Emergent topological properties in interacting one-dimensional systems with spin-orbit coupling" @default.
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- W2247451755 doi "https://doi.org/10.1103/physrevb.92.035139" @default.
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