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@ARTICLE{Schnauer:826070,
author = {Schönauer, K. and Weiss, S. and Feyer, V. and Lüftner, D.
and Stadtmüller, B. and Schwarz, D. and Sueyoshi, T. and
Kumpf, C. and Puschnig, P. and Ramsey, M. G. and Tautz, F.
S. and Soubatch, S.},
title = {{C}harge transfer and symmetry reduction at the
{C}u{P}c/{A}g(110) interface studied by photoemission
tomography},
journal = {Physical review / B},
volume = {94},
number = {20},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2017-00330},
pages = {205144},
year = {2016},
abstract = {On the Ag(110) surface copper phthalocyanine (CuPc) orders
in two structurally similar superstructures, as revealed by
low-energy electron diffraction. Scanning tunneling
microscopy (STM) shows that in both superstructures the
molecular planes are oriented parallel to the surface and
the long molecular axes, defined as diagonals of the square
molecule, are rotated by ≃±32∘ away from the
high-symmetry directions [1¯10] and [001] of the silver
surface. Similarly to many other adsorbed metal
phthalocyanines, the CuPc molecules on Ag(110) appear in STM
as crosslike features with twofold symmetry. Photoemission
tomography based on angle-resolved photoemission
spectroscopy reveals a charge transfer from the substrate
into the molecule. A symmetry analysis of experimental and
theoretical constant binding energy maps of the
photoemission intensity in the kx,ky-plane points to a
preferential occupation of one of the two initially
degenerate lowest unoccupied molecular orbitals (LUMOs) of
eg symmetry. The occupied eg orbital is rotated by 32∘
against the [001] direction of the substrate. The lifting of
the degeneracy of the LUMOs and the related reduction of the
symmetry of the adsorbed CuPc molecule are attributed to an
anisotropy in the chemical reactivity of the Ag(110)
surface.},
cin = {PGI-3},
ddc = {530},
cid = {I:(DE-Juel1)PGI-3-20110106},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142)},
pid = {G:(DE-HGF)POF3-142},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000388820200010},
doi = {10.1103/PhysRevB.94.205144},
url = {https://juser.fz-juelich.de/record/826070},
}