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Jill Miwa

Direct Measurement of the Band Structure of a Buried Two-Dimensional Electron Gas

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  • Jill Miwa
  • Philip Hofmann
  • Michelle Y. Simmons, University of New South Wales, Sydney, Australien
  • Justin Wells, Norwegian University of Science and Technology (NTNU), Norge
We directly measure the band structure of a buried two dimensional electron gas (2DEG) using angle
resolved photoemission spectroscopy. The buried 2DEG forms 2 nm beneath the surface of p-type silicon,
because of a dense delta-type layer of phosphorus n-type dopants which have been placed there. The
position of the phosphorous layer is beyond the probing depth of the photoemission experiment but
the observation of the 2DEG is nevertheless possible at certain photon energies where emission from the
states is resonantly enhanced. This permits direct access to the band structure of the 2DEG and its
temperature dependence.
TidsskriftPhysical Review Letters
Sider (fra-til)136801
StatusUdgivet - 2013

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