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ANOMALOUS QUENCHING OF PHOTOEMISSION FROM BULK STATES BY DEPOSITION OF CS ON INAS(100)

OLSSON, LO (author)
ILVER, L (author)
KANSKI, J (author)
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NILSSON, PO (author)
KOWALSKI, BJ (author)
HAKANSSON, MC (author)
KARLSSON, Ulf O (author)
KTH,Skolan för informations- och kommunikationsteknik (ICT),Materialfysik
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 (creator_code:org_t)
1995
1995
English.
In: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 52:3, s. 1470-1473
  • Journal article (peer-reviewed)
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  • The effect of angle-resolved valence-hand photoelectron spectra from adsorption of small amounts of Cs on InAs(100)4 X 2 has been studied. It is shown that a bulk interband transition is totally quenched at a coverage of Cs that leaves the 4 X 2 reconstruction practically intact. The surface order was monitored by low-energy electron diffraction and photoemission from surface states. A shift of the surface Fermi level to well above the conduction-band minimum is also observed. It is proposed that the resulting development of a two-dimensional electron gas at the surface affects the bulk states probed in photoemission.

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