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@ARTICLE{Schnedler:202125,
author = {Schnedler, M. and Portz, V. and Eisele, H. and Ebert, Ph.
and Dunin-Borkowski, Rafal},
title = {{P}olarity-dependent pinning of a surface state},
journal = {Physical review / B},
volume = {91},
number = {20},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-04414},
pages = {205309},
year = {2015},
abstract = {We illustrate a polarity-dependent Fermi level pinning at
semiconductor surfaces with chargeable surface states within
the fundamental band gap. Scanning tunneling spectroscopy of
the GaN(101¯0) surface shows that the intrinsic surface
state within the band gap pins the Fermi energy only at
positive voltages, but not at negative ones. This polarity
dependence is attributed to arise from limited electron
transfer from the conduction band to the surface state due
to quantum mechanically prohibited direct transitions. Thus,
a chargeable intrinsic surface state in the band gap may not
pin the Fermi level or only at one polarity, depending on
the band to surface state transition rates.},
cin = {PGI-5},
ddc = {530},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000354972700010},
doi = {10.1103/PhysRevB.91.205309},
url = {https://juser.fz-juelich.de/record/202125},
}