Helical nuclear spin order in two-subband quantum wires
arXiv:1303.1542 · doi:10.1103/PhysRevB.87.235427
Abstract
In quantum wires, the hyperfine coupling between conduction electrons and nuclear spins can lead to a (partial) ordering of both of them at low temperatures. By an interaction-enhanced mechanism, the nuclear spin order, caused by RKKY exchange, acts back onto the electrons and gaps out part of their spectrum. In wires with two subbands characterized by distinct Fermi momenta kF1 and kF2, the nuclear spins form a superposition of two helices with pitches π/kF1 and π/kF2, thus exhibiting a beating pattern. This order results in a reduction of the electronic conductance in two steps upon lowering the temperature.
20 pages, 9 figures. Version as published with minor modification as compared to v1 (some short discussions in the introduction and summary, and one figure, have been added)
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Cited by in corpus (24)
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- Majorana zero modes on a necklace
- Evidence for Helical Nuclear Spin Order in GaAs Quantum Wires
- Effects of nuclear spins on the transport properties of the edge of two-dimensional topological insulators
- Helical nuclear spin order in a strip of stripes in the Quantum Hall regime
- Helical Liquids in Semiconductors
- Antiferromagnetic nuclear spin helix and topological superconductivity in C nanotubes
- Controlling Majorana states in topologically inhomogeneous superconductors
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