HREELS investigation of V6O13(001) in the metallic and semiconducting phase

Autor:	G Dalmai, Lucien Fiermans, Hilde Poelman, Joost Vennik
Rok vydání:	1992
Předmět:	Free electron model chemistry.chemical_classification Phase transition Condensed matter physics Phonon Surfaces and Interfaces Surface phonon Electron Condensed Matter Physics Spectral line Surfaces Coatings and Films chemistry Phase (matter) Materials Chemistry Inorganic compound
Zdroj:	Surface Science. 275:351-356
ISSN:	0039-6028
DOI:	10.1016/0039-6028(92)90807-i
Popis:	HREEL spectra of V 6 O 13 (001) were recorded above and below the semiconductor-metal phase transition temperature (150 K). At room temperature, the spectrum is found to display surface phonon losses superposed on a free electron background due to inefficient electron screening. Upon cooling below 150 K the spectrum exhibits considerable changes in both loss structure and electronic background, as a result of the phase transition. While for the semiconducting state the complexity of the spectrum and incompleteness of the available optical data prevent an identification of the phonon losses, a preliminary assignment of the losses observed in the metallic phase is achieved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::075cd122ecbd297b45c88b2b167367c2 https://doi.org/10.1016/0039-6028(92)90807-i Zobrazit plný text záznamu