Helical liquids and Majorana bound states in quantum wires.

@article{Oreg2010HelicalLA,
  title={Helical liquids and Majorana bound states in quantum wires.},
  author={Yuval Oreg and Gil Refael and Felix von Oppen},
  journal={Physical review letters},
  year={2010},
  volume={105 17},
  pages={
          177002
        }
}
We show that the combination of spin-orbit coupling with a Zeeman field or strong interactions may lead to the formation of a helical electron liquid in single-channel quantum wires, with spin and velocity perfectly correlated. We argue that zero-energy Majorana bound states are formed in various situations when such wires are situated in proximity to a conventional s-wave superconductor. This occurs when the external magnetic field, the superconducting gap, or, most simply, the chemical… 

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