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

doi:10.1038/ncomms9691

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DOI Доступ к ресурсу на сайте издателя			10.1038/ncomms9691

#квантовая интерференция

#материаловедение

#электронный газ двумерный

Title: Direct observation of many-body charge density oscillations in a two-dimensional electron gas
Creator: Sessi, Paolo
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Nechaev, Ilya A.
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Bathon, Thomas
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El-Kareh, Lydia
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Chulkov, Evgueni V.
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Echenique, Pedro Miguel
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Bode, Matthias
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Silkin, Vyacheslav M.
Contributor: Томский государственный университет Физический факультет Кафедра физики металлов
Date: 2015
DOI: 10.1038/ncomms9691
Description: 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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collection(s): Физический факультет
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Nature communications. 2015. Vol. 6, Art. № 8691. P. 1-6-
Language: eng

Created: 16-05-2016

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