Alkali-metal-induced Fermi level and two dimensional electrons at cleaved InAs(110) surfaces

Details Alkali-metal-induced Fermi level and two dimensional electrons at cleaved InAs(110) surfaces Alkali-metal-induced Fermi level and two dimensional electrons at cleaved InAs(110) surfaces

2008-03-31

arxiv.org/abs/0803.4448v2

Phys. Rev. B 77, 233301 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 4 figures

Scientific paper

10.1103/PhysRevB.77.233301

Low-temperature Hall measurements have been performed on two-dimensional electron gases (2DEGs) induced by deposition of Cs or Na on in situ cleaved surfaces of p-type InAs. The surface donor level, at which the Fermi energy of the 2DEG is pinned, is calculated from the observed saturation surface electron density using a surface potential determined self-consistently. The results are compared to those of previous photoelectron spectroscopy measurements.

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