Details
| Original language | English |
|---|---|
| Article number | 245414 |
| Journal | Physical Review B |
| Volume | 98 |
| Issue number | 24 |
| Publication status | Published - 17 Dec 2018 |
Abstract
Understanding the response of low-dimensional electronic systems to external perturbations is of great interest for fundamental science as well as future applications. Here we employ plasmon spectroscopy to study the modification of metallicity in Au-induced quantum wires on the Si(553) surface by hydrogenation. The present study shows that no direct bond formation to the Au chains is necessary for controllable modifications of metallicity. Instead, changes in band structure of the whole system by H adsorbed at the Si step edges suffice via indirect interaction, as proven by the quantitative agreement between first-principles calculations and the unoccupied band structure derived from plasmon spectroscopy. Interestingly, simple electron donation has a similar effect as hydrogen adsorption at the step edges with respect to the Au bands and the dimerization of the Au chains.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 98, No. 24, 245414, 17.12.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Extrinsic doping on the atomic scale
T2 - Tuning metallicity in atomic Au chains
AU - Mamiyev, Zamin
AU - Sanna, S.
AU - Lichtenstein, Timo
AU - Tegenkamp, Christoph
AU - Pfnür, Herbert
N1 - ©2018 American Physical Society
PY - 2018/12/17
Y1 - 2018/12/17
N2 - Understanding the response of low-dimensional electronic systems to external perturbations is of great interest for fundamental science as well as future applications. Here we employ plasmon spectroscopy to study the modification of metallicity in Au-induced quantum wires on the Si(553) surface by hydrogenation. The present study shows that no direct bond formation to the Au chains is necessary for controllable modifications of metallicity. Instead, changes in band structure of the whole system by H adsorbed at the Si step edges suffice via indirect interaction, as proven by the quantitative agreement between first-principles calculations and the unoccupied band structure derived from plasmon spectroscopy. Interestingly, simple electron donation has a similar effect as hydrogen adsorption at the step edges with respect to the Au bands and the dimerization of the Au chains.
AB - Understanding the response of low-dimensional electronic systems to external perturbations is of great interest for fundamental science as well as future applications. Here we employ plasmon spectroscopy to study the modification of metallicity in Au-induced quantum wires on the Si(553) surface by hydrogenation. The present study shows that no direct bond formation to the Au chains is necessary for controllable modifications of metallicity. Instead, changes in band structure of the whole system by H adsorbed at the Si step edges suffice via indirect interaction, as proven by the quantitative agreement between first-principles calculations and the unoccupied band structure derived from plasmon spectroscopy. Interestingly, simple electron donation has a similar effect as hydrogen adsorption at the step edges with respect to the Au bands and the dimerization of the Au chains.
UR - http://www.scopus.com/inward/record.url?scp=85058663146&partnerID=8YFLogxK
U2 - 10.1103/physrevb.98.245414
DO - 10.1103/physrevb.98.245414
M3 - Article
AN - SCOPUS:85058663146
VL - 98
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 24
M1 - 245414
ER -