Pressure-induced transformations in amorphous Si-Ge alloy (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Pressure-induced transformations in amorphous Si-Ge alloy (Articolo in rivista) (literal)

Anno

• 2012-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevB.85.045201 (literal)

Alternative label

• F. Coppari: A. Polian; N. Menguy; A. Trapananti; A. Congeduti; M. Newville; V. B. Prakapenka; Y. Choi; E. Principi; A. Di Cicco (2012)
  Pressure-induced transformations in amorphous Si-Ge alloy
  in Physical review. B, Condensed matter and materials physics
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• F. Coppari: A. Polian; N. Menguy; A. Trapananti; A. Congeduti; M. Newville; V. B. Prakapenka; Y. Choi; E. Principi; A. Di Cicco (literal)

Pagina inizio

• 045201 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 85 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Univ Paris 06, IMPMC, CNRS UMR 7590, FR-75005 Paris, France Univ Paris 06, IMPMC, CNRS UMR 7590, FR-75005 Paris, France Univ Paris 06, IMPMC, CNRS UMR 7590, FR-75005 Paris, France CNR-IOM, OGG Grenoble, c/o ESRF BP 220, FR-38043 Grenoble, France Synchrotron Soleil, FR-91192 St Aubin, Gif S Yvette, France Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA Univ Camerino, Dip Fis, CNISM, IT-62032 Camerino, MC, Italy; Sincrotrone Trieste SCpA, IT-34149 Trieste, Italy Univ Paris 06, IMPMC, CNRS UMR 7590, FR-75005 Paris, France; Univ Camerino, Dip Fis, CNISM, IT-62032 Camerino, MC, Italy (literal)

Titolo

• Pressure-induced transformations in amorphous Si-Ge alloy (literal)

Abstract

• The pressure behavior of an amorphous Si-rich SiGe alloy (alpha-Si(x)Ge(1-x), x = 0.75) has been investigated up to about 30 GPa, by a combination of Raman spectroscopy, x-ray absorption spectroscopy, and x-ray diffraction measurements. The trends of microscopic structural properties and of the Raman-active phonon modes are presented in the whole pressure range. Nucleation of nanocrystalline alloy particles and metallization have been observed above 12 GPa, with a range of about 2 GPa of coexistence of amorphous and crystalline phases. Transformations from the amorphous tetrahedral, to the crystalline tetragonal (beta-Sn) and to the simple hexagonal structures have been observed around 13.8 and 21.8 GPa. The recovered sample upon depressurization, below about 4 GPa, shows a local structure similar to the as-deposited one. Inhomogeneities of the amorphous texture at the nanometric scale, probed by high-resolution transmission electron microscopy, indicate that the recovered amorphous sample has a different ordering at this scale, and therefore the transformations can not be considered fully reversible. The role of disordered grain boundaries at high pressure and the possible presence of a high-density amorphous phase are discussed. (literal)

Prodotto di

• Sviluppo di strumentazione e di metodologie sperimentali avanzate per lo studio delle proprieta strutturali dei materiali con raggi X da sincrotrone (MD.P04.007.001) (Modulo)

Autore CNR

• ANGELA TRAPANANTI (Persona)

Incoming links:

Autore CNR di

• ANGELA TRAPANANTI (Persona)

Prodotto

• Sviluppo di strumentazione e di metodologie sperimentali avanzate per lo studio delle proprieta strutturali dei materiali con raggi X da sincrotrone (MD.P04.007.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review. B, Condensed matter and materials physics (Rivista)