Hut-shaped lead nanowires with one-dimensional electronic properties
| Autor: | Ryszard Zdyb, M. Kopciuszyński, M. Dachniewicz, A. Stȩpniak-Dybala, Lucyna Żurawek, Mariusz Krawiec |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Band gap Fermi level Scanning tunneling spectroscopy Nanowire 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology 01 natural sciences symbols.namesake X-ray photoelectron spectroscopy 0103 physical sciences symbols Density functional theory 010306 general physics 0210 nano-technology Anisotropy |
| Zdroj: | Physical Review B. 102 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.102.125415 |
| Popis: | The ultrathin Pb layer on the Si(110) surface might be converted into hut-shaped nanowires extending in a unique $[\overline{1}10]$ direction. Despite the fact that about 2.6 ML of lead is used to form an ordered array of nanowires, this system shows not only anisotropy of the electronic structure but also a small band gap in the [001] direction. Among several quasi-one-dimensional bands, two of them show pure one-dimensional character. Electron dispersion maps measured with photoelectron spectroscopy are supported by scanning tunneling spectroscopy data which confirm the absence of electronic states at the Fermi level in areas between lead nanowires. Based on first-principles density functional theory calculations four different structural models of lead nanowires are proposed reflecting a different number of Pb atoms in the unit cell. |
| Databáze: | OpenAIRE |
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