Details
| Original language | English |
|---|---|
| Article number | 035438 |
| Journal | Physical Review B |
| Volume | 102 |
| Issue number | 3 |
| Publication status | Published - 27 Jul 2020 |
Abstract
The low-temperature spin-orbit density phase of Pb quantum wires on Si(557) was investigated by scanning tunneling microscopy. High resolution images of this phase allow the proposal of an atomistic model for the densely-packed Pb coverages on the (223) facets. A metal-insulator phase transition was confirmed by local spectroscopy and the BCS-like gap feature of 2Δ≈30meV at 10 K correlates with the transition temperature of Tc=78K seen in surface transport experiments. Moreover, Pb excess coverage adds an extra row of Pb atoms on the mini-(111) terraces. These atoms induce a metallic state located at the step edge at low temperature and quench the charge and spin correlations of the spin-orbit density phase.
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. 102, No. 3, 035438, 27.07.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electronic correlation effects in Pb quantum wires on Si(557)
AU - Quentin, M.
AU - Nguyen, T. T. Nhung
AU - Pfnür, H.
AU - Tegenkamp, C.
N1 - Funding information: The Deutsche Forschungsgemeinschaft (DFG) is gratefully acknowledged. The work was supported via the project Te386/10-2 within the Research Unit FOR1700.
PY - 2020/7/27
Y1 - 2020/7/27
N2 - The low-temperature spin-orbit density phase of Pb quantum wires on Si(557) was investigated by scanning tunneling microscopy. High resolution images of this phase allow the proposal of an atomistic model for the densely-packed Pb coverages on the (223) facets. A metal-insulator phase transition was confirmed by local spectroscopy and the BCS-like gap feature of 2Δ≈30meV at 10 K correlates with the transition temperature of Tc=78K seen in surface transport experiments. Moreover, Pb excess coverage adds an extra row of Pb atoms on the mini-(111) terraces. These atoms induce a metallic state located at the step edge at low temperature and quench the charge and spin correlations of the spin-orbit density phase.
AB - The low-temperature spin-orbit density phase of Pb quantum wires on Si(557) was investigated by scanning tunneling microscopy. High resolution images of this phase allow the proposal of an atomistic model for the densely-packed Pb coverages on the (223) facets. A metal-insulator phase transition was confirmed by local spectroscopy and the BCS-like gap feature of 2Δ≈30meV at 10 K correlates with the transition temperature of Tc=78K seen in surface transport experiments. Moreover, Pb excess coverage adds an extra row of Pb atoms on the mini-(111) terraces. These atoms induce a metallic state located at the step edge at low temperature and quench the charge and spin correlations of the spin-orbit density phase.
UR - http://www.scopus.com/inward/record.url?scp=85090155766&partnerID=8YFLogxK
U2 - 10.1103/physrevb.102.035438
DO - 10.1103/physrevb.102.035438
M3 - Article
VL - 102
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 3
M1 - 035438
ER -