Atomistic picture of charge density wave formation at surfaces
- We used ultrafast electron diffraction and density-functional theory calculations to gain insight into the charge density wave (CDW) formation on In/Si(111). Weak excitation by a femtosecond-laser pulse results in the melting of the CDW. The immediate freezing is hindered by a barrier for the motion of atoms during the phase transition: The melted CDW constitutes a long-lived, supercooled phase and is strong evidence for a first-order transition. The freezing into the CDW is triggered by preexisting adsorbates. Starting at these condensation nuclei, the CDW expands one dimensionally on the In/Si(111) surface, with a constant velocity of more than 80 m/s.
Author: | Simone Wall, Boris Krenzer, Stefan Wippermann, Simone Sanna, Friedrich Klasing, Anja Hanisch-Blicharski, Martin KammlerORCiDGND, Wolf Gero Schmidt, Michael Horn-von Hoegen |
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DOI: | https://doi.org/10.1103/PhysRevLett.109.186101 |
Parent Title (English): | Physical review letters |
Publisher: | APS |
Document Type: | Article |
Language: | English |
Year of first Publication: | 2012 |
Release Date: | 2022/11/24 |
Volume: | 109 |
Issue: | 18 |
Institutes: | Fakultät Angewandte Natur- und Kulturwissenschaften |
Fakultät Angewandte Natur- und Kulturwissenschaften / Labor Nanoanalytik und Halbleiterchemie (Nanochem) | |
Begutachtungsstatus: | peer-reviewed |
Publication: | Externe Publikationen |
research focus: | Produktion und Systeme |
Licence (German): |