Many-body effects in the electronic structure of Sn/Si(111)-α-(3)1/2

Autor:	Anne Charrier, J-M Debever, F. Thibaudau, Fernando Flores, Rubén Pérez, J-M Themlin, José Ortega
Rok vydání:	2001
Předmět:	Surface (mathematics) Condensed matter physics Chemistry Fermi level Inverse photoemission spectroscopy Electronic structure Condensed Matter Physics Many body symbols.namesake Phase (matter) symbols General Materials Science Band crossing Surface states
Zdroj:	Journal of Physics: Condensed Matter. 13:L521-L528
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/13/22/112
Popis:	The unoccupied electronic structure of the model interface Sn/Si(111)-α-(3)1/2 has been measured at room temperature (RT) using angle-resolved inverse photoemission spectroscopy (KRIPES). In addition to a partly occupied surface band crossing the Fermi level, there is a second unoccupied surface state located 1.5 eV above EF; the existence of these two surface states is not compatible with the single adatom site used to describe the α-(3)1/2 reconstruction. These surface states receive a natural explanation, once many-body effects are introduced, in the framework of a dynamical fluctuations model, where two types of adatom site, reminiscent of a possible low-temperature (3×3) phase, coexist at RT.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::40981f95e78b6b8a9fc63e35911cd645 https://doi.org/10.1088/0953-8984/13/22/112 Zobrazit plný text záznamu