The Ge(111) surface has been studied by photoemission and photoabsorption spectroscopies as a function of temperature up to 1200 K. Up to 1020 K the data indicate the presence of an adatom-restatom reconstruction, with a gradual weak metallization of the surface between 600 and 1020 K. Evidence for a high-temperature phase transition is found between 1020 and 1085 K from core-level spectroscopy. Valence-band photoemission spectra and photoabsorption data indicate a metallic surface layer above this phase transition. About 0.7–1 atomic bilayer is estimated to undergo the semiconductor to metal transition. All these data can be interpreted consistently with an incomplete surface-melting scenario.

Photoemission and photoabsorption study of the high-temperature phases of the Ge(111) surface

MODESTI, SILVIO
1997-01-01

Abstract

The Ge(111) surface has been studied by photoemission and photoabsorption spectroscopies as a function of temperature up to 1200 K. Up to 1020 K the data indicate the presence of an adatom-restatom reconstruction, with a gradual weak metallization of the surface between 600 and 1020 K. Evidence for a high-temperature phase transition is found between 1020 and 1085 K from core-level spectroscopy. Valence-band photoemission spectra and photoabsorption data indicate a metallic surface layer above this phase transition. About 0.7–1 atomic bilayer is estimated to undergo the semiconductor to metal transition. All these data can be interpreted consistently with an incomplete surface-melting scenario.
1997
http://dx.doi.org/10.1016/S0039-6028(97)00207-0
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2560254
 Avviso

Registrazione in corso di verifica.
La registrazione di questo prodotto non è ancora stata validata in ArTS.

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 29
social impact