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@ARTICLE{Eickhoff:874487,
author = {Eickhoff, Fabian and Kolodzeiski, Elena and Esat, Taner and
Fournier, Norman and Wagner, Christian and Deilmann,
Thorsten and Temirov, Ruslan and Rohlfing, Michael and
Tautz, F. Stefan and Anders, Frithjof B.},
title = {{I}nelastic electron tunneling spectroscopy for probing
strongly correlated many-body systems by scanning tunneling
microscopy},
journal = {Physical review / B},
volume = {101},
number = {12},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2020-01466},
pages = {125405},
year = {2020},
abstract = {We present an extension of the tunneling theory for
scanning tunneling microscopy (STM) to include different
types of electron-vibrational couplings responsible for
inelastic contributions to the tunnel current in the
strong-coupling limit. It allows for a better understanding
of more complex scanning tunneling spectra of molecules on a
metallic substrate in separating elastic and inelastic
contributions. The starting point is the exact solution of
the spectral functions for the electronically active local
orbitals in the absence of the STM tip. This includes
electron-phonon coupling in the coupled system comprising
the molecule and the substrate to arbitrary order including
the antiadiabatic strong-coupling regime as well as the
Kondo effect on a free-electron spin of the molecule. The
tunneling current is derived in second order of the
tunneling matrix element which is expanded in powers of the
relevant vibrational displacements. We use the results of an
ab initio calculation for the single-particle electronic
properties as an adapted material-specific input for a
numerical renormalization group approach for accurately
determining the electronic properties of a
1,4,5,8-naphthalene-tetracarboxylic acid dianhydride
molecule on Ag(111) as a challenging sample system for our
theory. Our analysis shows that the mismatch between the ab
initio many-body calculation of the tunnel current in the
absence of any electron-phonon coupling to the experimental
scanning tunneling spectra can be resolved by including two
mechanisms: (i) a strong unconventional Holstein term on the
local substrate orbital leads to the reduction of the Kondo
temperature and (ii) a further electron-vibrational coupling
to the tunneling matrix element is responsible for inelastic
steps in the dI/dV curve at finite frequencies},
cin = {PGI-3},
ddc = {530},
cid = {I:(DE-Juel1)PGI-3-20110106},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000518455900003},
doi = {10.1103/PhysRevB.101.125405},
url = {https://juser.fz-juelich.de/record/874487},
}