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Titolo:
Effect of surface reconstruction on the low-temperature oxidation of InAs(100): Optical investigations - art. no. 121314
Autore:
Berkovits, VL; Witkowski, N; Borensztein, Y; Paget, D;
Indirizzi:
AF Ioffe Physicotech Inst, St Petersburg 194021, Russia AF Ioffe Physicotech Inst St Petersburg Russia 194021 urg 194021, Russia Univ Paris 06, Lab Opt SOlides, CNRS, UMR 7601, F-75252 Paris 05, France Univ Paris 06 Paris France 05 , CNRS, UMR 7601, F-75252 Paris 05, France Ecole Polytech, Lab PMC, F-91128 Palaiseau, France Ecole Polytech Palaiseau France F-91128 b PMC, F-91128 Palaiseau, France
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 12, volume: 6312, anno: 2001,
pagine: 1314 -
SICI:
0163-1829(20010315)6312:12<1314:EOSROT>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; REFLECTANCE-DIFFERENCE SPECTROSCOPY; 001 SURFACES; ANISOTROPY SPECTROSCOPY; STRUCTURE TRANSITION; STEP MOTION; GAAS; GAAS(100); INAS; SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Berkovits, VL AF Ioffe Physicotech Inst, St Petersburg 194021, Russia AF Ioffe Physicotech Inst St Petersburg Russia 194021 ssia
Citazione:
V.L. Berkovits et al., "Effect of surface reconstruction on the low-temperature oxidation of InAs(100): Optical investigations - art. no. 121314", PHYS REV B, 6312(12), 2001, pp. 1314

Abstract

Using reflectance anisotropy spectroscopy (RAS), after identifying the main spectral lines, for the InAs(001) surfaces, we demonstrate that low-temperature (140 K) oxygen adsorption proceeds in a completely different way forthe As-rich and for the In-rich surfaces. Oxygen is chemisorbed on the In-rich (4X2) surface, as found from the disappearance from the RA spectrum ofthe optical transitions due to surface dimers. The adsorbed oxygen cannot be removed by annealing, even up to 670 K. On the As-rich beta (2) and alpha (2) surface reconstructions, adsorption is limited to molecular physisorption: oxygen is desorbed by annealing at a significantly lower temperature of approximate to 300 K, and only weakly perturbs the signal related to surface dimers.

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Documento generato il 01/04/20 alle ore 02:03:35