Imaging of the Cu(111) surface state in scanning tunneling microscopy

Hörmandinger, G.

doi:10.1103/physrevb.49.13897

Cited by 97 publications

(63 citation statements)

References 24 publications

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“…We started from the latter evaluated according to ref. 24 as the tunnelling current with a coefficient depending on tip-sample distance and work function. In our calculations of the tunnelling current required by the formula…”

Section: Bulkmentioning

confidence: 99%

Direct observation of many-body charge density oscillations in a two-dimensional electron gas

et al. 2015

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Quantum interference is a striking manifestation of one of the basic concepts of quantum mechanics: the particle-wave duality. A spectacular visualization of this effect is the standing wave pattern produced by elastic scattering of surface electrons around defects, which corresponds to a modulation of the electronic local density of states and can be imaged using a scanning tunnelling microscope. To date, quantum-interference measurements were mainly interpreted in terms of interfering electrons or holes of the underlying band-structure description. Here, by imaging energy-dependent standing-wave patterns at noble metal surfaces, we reveal, in addition to the conventional surface-state band, the existence of an 'anomalous' energy band with a well-defined dispersion. Its origin is explained by the presence of a satellite in the structure of the many-body spectral function, which is related to the acoustic surface plasmon. Visualizing the corresponding charge oscillations provides thus direct access to many-body interactions at the atomic scale.

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Section: Bulkmentioning

confidence: 99%

Direct observation of many-body charge density oscillations in a two-dimensional electron gas

et al. 2015

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“…On Cu they represent the well-known Shockley-type surface state electrons scattered by defects 49 , whereas on BN they are assigned to an interface state band 50 . A close inspection of Fig.…”

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confidence: 99%

Boron Nitride on Cu(111): An Electronically Corrugated Monolayer

et al. 2012

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“…Following Hörmandinger [190] the tip was approximated by a single atom, using a 4 eV optical potential to give a realistic spectral density. The sample Green function was calculated using multiple-scattering techniques treating the crystal within the atomic-sphere approximation [191].…”

Section: Spectroscopy Of ''Perfect'' Surfacesmentioning

confidence: 99%