Charge and Spin Reconstruction in Quantum Hall Strips

Details Charge and Spin Reconstruction in Quantum Hall Strips Charge and Spin Reconstruction in Quantum Hall Strips

2011-02-09

arxiv.org/abs/1102.1908v1

Phys. Rev. B 83, 205307 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages

Scientific paper

10.1103/PhysRevB.83.205307

We study the effect of electron-electron interactions on the charge and spin structures of a Quantum Hall strip in a triangularly confined potential. We find that the strip undergoes a spin-unpolarized to spin-polarized transition as a function of magnetic field perpendicular to the strip. For sharp confinements the spin-polarization transition is spontaneous and first develops at the softer side of the triangular potential which shows up as an "eye-structure" in the electron dispersion. For sufficiently weak confinements this spin-polarization transition is preceded by a charge reconstruction of a single spin species, which creates a spin-polarized strip of electrons with a width of the order of the magnetic length detached from the rest of the system. Relevance of our findings to the recent momentum resolved tunneling experiments is also discussed.

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