Details
| Original language | English |
|---|---|
| Article number | 161408 |
| Journal | Physical Review B |
| Volume | 93 |
| Issue number | 16 |
| Publication status | Published - 18 Apr 2016 |
Abstract
Dimensional crossover is of high relevance to understanding real-world quasi-one-dimensional (1D) systems. Here we study the collective excitations, measured as plasmon dispersions in an electron energy loss experiment, in a tunable family of model systems, namely, Au chains on stepped Si(hhk) substrates, that allow variations of chain widths and interchain spacings. We indeed observe 1D-like dispersions, but with a significant influence of higher dimensions. Surprisingly, we find that it is not the interchain coupling but the width of the conduction channel, as confirmed by tunneling spectroscopy, that dominates the excitations.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical Review B, Vol. 93, No. 16, 161408, 18.04.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Two-dimensional crossover and strong coupling of plasmon excitations in arrays of one-dimensional atomic wires
AU - Lichtenstein, Timo
AU - Aulbach, J.
AU - Schäfer, J.
AU - Claessen, R.
AU - Tegenkamp, Christoph
AU - Pfnür, Herbert
N1 - Funding information: Financial support by the Deutsche Forschungsgemeinschaft through FOR1700 is gratefully acknowledged.
PY - 2016/4/18
Y1 - 2016/4/18
N2 - Dimensional crossover is of high relevance to understanding real-world quasi-one-dimensional (1D) systems. Here we study the collective excitations, measured as plasmon dispersions in an electron energy loss experiment, in a tunable family of model systems, namely, Au chains on stepped Si(hhk) substrates, that allow variations of chain widths and interchain spacings. We indeed observe 1D-like dispersions, but with a significant influence of higher dimensions. Surprisingly, we find that it is not the interchain coupling but the width of the conduction channel, as confirmed by tunneling spectroscopy, that dominates the excitations.
AB - Dimensional crossover is of high relevance to understanding real-world quasi-one-dimensional (1D) systems. Here we study the collective excitations, measured as plasmon dispersions in an electron energy loss experiment, in a tunable family of model systems, namely, Au chains on stepped Si(hhk) substrates, that allow variations of chain widths and interchain spacings. We indeed observe 1D-like dispersions, but with a significant influence of higher dimensions. Surprisingly, we find that it is not the interchain coupling but the width of the conduction channel, as confirmed by tunneling spectroscopy, that dominates the excitations.
UR - http://www.scopus.com/inward/record.url?scp=84964555933&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.93.161408
DO - 10.1103/PhysRevB.93.161408
M3 - Article
AN - SCOPUS:84964555933
VL - 93
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 16
M1 - 161408
ER -