Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 9400-9406 |
| Seitenumfang | 7 |
| Fachzeitschrift | Journal of Physical Chemistry C |
| Jahrgang | 123 |
| Ausgabenummer | 14 |
| Frühes Online-Datum | 11 März 2019 |
| Publikationsstatus | Veröffentlicht - 11 Apr. 2019 |
Abstract
Self-assembled Au atomic wires on stepped Si surfaces are metallic, as evidenced by one-dimensionally dispersing plasmonic excitation. Here, we investigate the effects of oxidation on metallicity along such Au atomic wires on a regularly stepped Si(553) surface by employing infrared absorption and high-resolution electron energy loss spectroscopies. Our results indicate that only the Si environment undergoes oxidation, which has a remarkably small effect on the plasmon dispersion. However, close to k ∥ → 0 the plasmon dispersion starts at increasingly higher energies as a function of oxygen exposure, which is attributed to standing wave formation on small sections of Au wires generated by the introduction of O atoms as scattering centers, not to electronic gap opening. This interpretation is in full agreement with the findings by infrared spectroscopy and low-energy electron diffraction.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Energie (insg.)
- Allgemeine Energie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
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in: Journal of Physical Chemistry C, Jahrgang 123, Nr. 14, 11.04.2019, S. 9400-9406.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Plasmon Standing Waves by Oxidation of Si(553)-Au
AU - Mamiyev, Zamin
AU - Tzschoppe, Michael
AU - Huck, Christian
AU - Pucci, Annemarie
AU - Pfnür, Herbert
N1 - Funding information: We gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft in the research unit FOR 1700 and Niedersachsisches? Ministerium für Wissenschaft und Kultur through the graduate school “Contacts in Nano-systems”. Heidelberg: Funding by Collaborative Research Center SFB 1246. M.T. acknowledges support from the Heidelberg Graduate School for Fundamental Physics (HGSFP).
PY - 2019/4/11
Y1 - 2019/4/11
N2 - Self-assembled Au atomic wires on stepped Si surfaces are metallic, as evidenced by one-dimensionally dispersing plasmonic excitation. Here, we investigate the effects of oxidation on metallicity along such Au atomic wires on a regularly stepped Si(553) surface by employing infrared absorption and high-resolution electron energy loss spectroscopies. Our results indicate that only the Si environment undergoes oxidation, which has a remarkably small effect on the plasmon dispersion. However, close to k ∥ → 0 the plasmon dispersion starts at increasingly higher energies as a function of oxygen exposure, which is attributed to standing wave formation on small sections of Au wires generated by the introduction of O atoms as scattering centers, not to electronic gap opening. This interpretation is in full agreement with the findings by infrared spectroscopy and low-energy electron diffraction.
AB - Self-assembled Au atomic wires on stepped Si surfaces are metallic, as evidenced by one-dimensionally dispersing plasmonic excitation. Here, we investigate the effects of oxidation on metallicity along such Au atomic wires on a regularly stepped Si(553) surface by employing infrared absorption and high-resolution electron energy loss spectroscopies. Our results indicate that only the Si environment undergoes oxidation, which has a remarkably small effect on the plasmon dispersion. However, close to k ∥ → 0 the plasmon dispersion starts at increasingly higher energies as a function of oxygen exposure, which is attributed to standing wave formation on small sections of Au wires generated by the introduction of O atoms as scattering centers, not to electronic gap opening. This interpretation is in full agreement with the findings by infrared spectroscopy and low-energy electron diffraction.
UR - http://www.scopus.com/inward/record.url?scp=85063548323&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1903.04826
DO - 10.48550/arXiv.1903.04826
M3 - Article
AN - SCOPUS:85063548323
VL - 123
SP - 9400
EP - 9406
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 14
ER -