Details
| Original language | English |
|---|---|
| Article number | 045419 |
| Journal | Physical Review B |
| Volume | 100 |
| Issue number | 4 |
| Publication status | Published - 24 Jul 2019 |
Abstract
The Si(553)-Au system resembles a heteroatomic chain ensemble with a delicate spin-charge interplay. The ordering of the ×3 reconstruction vanishes via a phase transition taking place at Tc=100 K. Our directional-dependent surface transport measurements showed that this order-disorder phase transition is not driven by the formation of a charge-density wave, as previously suggested. Instead, at 65 K there is a pronounced increase of the surface-state conductivity along the wires. We attribute this to activated charge transfer between the localized Si dangling bond states and the proximate Au bands revealing a ×2 periodicity. Apparently, a quasiorthogonality between the wave functions of the two proximal reconstructions is also responsible for a missing ×6 periodicity along the wires. The electronic charge transfer is in agreement with recent band-structure calculations.
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. 100, No. 4, 045419, 24.07.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Charge-transfer transition in Au-induced quantum wires on Si(553)
AU - Edler, Frederik
AU - Miccoli, Ilio
AU - Pfnür, Herbert
AU - Tegenkamp, Christoph
N1 - Funding information: We gratefully acknowledge the fruitful discussions with B. Hafke and M. Horn-von Hoegen (University of Duisburg–Essen, Germany), C. Braun and W. Gero Schmidt (University of Paderborn, Germany), S. Sanna (University of Gießen, Germany), as well as the financial support by the Deutsche Forschungsgemeinschaft through our Research Unit FOR1700 (Project Te/386 10-2).
PY - 2019/7/24
Y1 - 2019/7/24
N2 - The Si(553)-Au system resembles a heteroatomic chain ensemble with a delicate spin-charge interplay. The ordering of the ×3 reconstruction vanishes via a phase transition taking place at Tc=100 K. Our directional-dependent surface transport measurements showed that this order-disorder phase transition is not driven by the formation of a charge-density wave, as previously suggested. Instead, at 65 K there is a pronounced increase of the surface-state conductivity along the wires. We attribute this to activated charge transfer between the localized Si dangling bond states and the proximate Au bands revealing a ×2 periodicity. Apparently, a quasiorthogonality between the wave functions of the two proximal reconstructions is also responsible for a missing ×6 periodicity along the wires. The electronic charge transfer is in agreement with recent band-structure calculations.
AB - The Si(553)-Au system resembles a heteroatomic chain ensemble with a delicate spin-charge interplay. The ordering of the ×3 reconstruction vanishes via a phase transition taking place at Tc=100 K. Our directional-dependent surface transport measurements showed that this order-disorder phase transition is not driven by the formation of a charge-density wave, as previously suggested. Instead, at 65 K there is a pronounced increase of the surface-state conductivity along the wires. We attribute this to activated charge transfer between the localized Si dangling bond states and the proximate Au bands revealing a ×2 periodicity. Apparently, a quasiorthogonality between the wave functions of the two proximal reconstructions is also responsible for a missing ×6 periodicity along the wires. The electronic charge transfer is in agreement with recent band-structure calculations.
UR - http://www.scopus.com/inward/record.url?scp=85070452710&partnerID=8YFLogxK
U2 - 10.1103/physrevb.100.045419
DO - 10.1103/physrevb.100.045419
M3 - Article
AN - SCOPUS:85070452710
VL - 100
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 4
M1 - 045419
ER -