Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots

I. Hapke-Wurst; U. Zeitler; H. Frahm; A. G. M. Jansen; R. J. Haug; K. Pierz

doi:10.1103/PhysRevB.62.12621

Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots

Mesoscale and Nanoscale Physics 2009-10-31 v3

Authors: I. Hapke-Wurst , U. Zeitler , H. Frahm , A. G. M. Jansen , R. J. Haug , K. Pierz

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Abstract

Current steps attributed to resonant tunneling through individual InAs quantum dots embedded in a GaAs-AlAs-GaAs tunneling device are investigated experimentally in magnetic fields up to 28 T. The steps evolve into strongly enhanced current peaks in high fields. This can be understood as a field-induced Fermi-edge singularity due to the Coulomb interaction between the tunneling electron on the quantum dot and the partly spin polarized Fermi sea in the Landau quantized three-dimensional emitter.

Keywords

quantum dot spin-dependent tunneling magnetic field Fermi-edge singularity Coulomb interaction

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@article{arxiv.cond-mat/0003400,
  title  = {Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots},
  author = {I. Hapke-Wurst and U. Zeitler and H. Frahm and A. G. M. Jansen and R. J. Haug and K. Pierz},
  journal= {arXiv preprint arXiv:cond-mat/0003400},
  year   = {2009}
}

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5 pages, 4 figures

Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots

Abstract

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