Half-metal phases in a quantum wire with modulated spin-orbit interaction
arXiv:1709.02217 · doi:10.1103/PhysRevB.96.205135
Abstract
We propose a spin valve device based on the interplay of a modulated spin-orbit interaction and a uniform external magnetic field acting on a quantum wire. Half-metal phases, where electrons with only a selected spin polarization exhibit ballistic conductance, can be tuned by varying the magnetic field. These half-metal phases are proven to be robust against electron-electron repulsive interactions. Our results arise from a combination of explicit band diagonalization, bosonization techniques and extensive DMRG computations.
arXiv comment5 pages, 4 figures
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