Site of Mn in Mn delta-doped GaAs: X-ray absorption spectroscopy (Articolo in rivista)

Type

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

Label

• Site of Mn in Mn delta-doped GaAs: X-ray absorption spectroscopy (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

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

• 10.1103/PhysRevB.73.035314 (literal)

Alternative label

• d'Acapito, F (d'Acapito, F); Smolentsev, G (Smolentsev, G); Boscherini, F (Boscherini, F); Piccin, M (Piccin, M); Bais, G (Bais, G); Rubini, S (Rubini, S); Martelli, F (Martelli, F); Franciosi, A (Franciosi, A) (2006)
  Site of Mn in Mn delta-doped GaAs: X-ray absorption spectroscopy
  in Physical review. B, Condensed matter and materials physics
  (literal)

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

• d'Acapito, F (d'Acapito, F); Smolentsev, G (Smolentsev, G); Boscherini, F (Boscherini, F); Piccin, M (Piccin, M); Bais, G (Bais, G); Rubini, S (Rubini, S); Martelli, F (Martelli, F); Franciosi, A (Franciosi, A) (literal)

Pagina inizio

• 035314 (literal)

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

• 73 (literal)

Rivista

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

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

• 3 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• 1. CRG, GILDA, ESRF, CNR,INFM,OGG, F-38043 Grenoble, France 2. Rostov State Univ, Dept Phys, Rostov Na Donu 344006, Russia 3. Univ Bologna, Dept Phys, I-40127 Bologna, Italy 4. Univ Bologna, CNISM, I-40127 Bologna, Italy 5. CNR, INFM, Lab Nazl TASC, I-34012 Trieste, Italy (literal)

Titolo

• Site of Mn in Mn delta-doped GaAs: X-ray absorption spectroscopy (literal)

Abstract

• In order to determine the local structure of Mn in delta-doped GaAs layers we have carried out an x-ray absorption spectroscopy experiment at the Mn-K edge in samples grown by molecular beam epitaxy with and without Be co-doping. Mn-Mn atomic correlations have not been found within similar to 5 A radius, ruling out the presence of metallic clusters or local Mn enrichment. In samples deposited at 300 degrees C, Mn substitutionally occupies the Ga site with a local expansion (approximate to 2%) of the first-neighbor distance with respect to GaAs; the second neighbors remain at a distance very close to that of the host lattice, indicating that the structural perturbation induced by Mn is very localized. Ab initio simulation of the x-ray absorption near edge structure spectra confirmed that Mn enters the Ga, rather than the As, site. Samples grown at 450 degrees C exhibit a reduction of the first shell coordination number, suggesting the initial phases of MnAs precipitation. In the case of Be co-doping the downward shift of the Fermi energy leads to the appearance of Mn in tetrahedral interstitial sites, of which we provide a previously unavailable local structural description. (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

• FAUSTINO MARTELLI (Unità di personale interno)
• ALFONSO FRANCIOSI (Unità di personale esterno)
• SILVIA RUBINI (Unità di personale interno)
• FRANCESCO D'ACAPITO (Persona)

Incoming links:

Autore CNR di

• FAUSTINO MARTELLI (Unità di personale interno)
• SILVIA RUBINI (Unità di personale interno)
• FRANCESCO D'ACAPITO (Persona)
• ALFONSO FRANCIOSI (Unità di personale esterno)

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)