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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.

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Metadaten
Author:Simone Wall, Boris Krenzer, Stefan Wippermann, Simone Sanna, Friedrich Klasing, Anja Hanisch-Blicharski, Martin KammlerORCiDGND, Wolf Gero Schmidt, Michael Horn-von Hoegen
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):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
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