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Volumn 385, Issue 1, 1997, Pages 146-154

Diffusion of adsorbed Si dimers on Si(001)

Author keywords

Epitaxy growth; Models of surface kinetics; Molecular dynamics; Scanning tunneling microscopy; Silicon; Stepped single crystal surfaces; Surface diffusion

Indexed keywords

ACTIVATION ENERGY; ADSORPTION; CRYSTAL ORIENTATION; DIFFUSION IN SOLIDS; EPITAXIAL GROWTH; FREE ENERGY; MOLECULAR DYNAMICS; SCANNING TUNNELING MICROSCOPY; SINGLE CRYSTALS; SUBSTRATES; SURFACE STRUCTURE;

EID: 0031209223     PISSN: 00396028     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0039-6028(97)00222-7     Document Type: Article
Times cited : (42)

References (23)
  • 7
    • 0039801042 scopus 로고
    • Ordering at Surfaces and Interfaces
    • A. Yoshimori, T. Shinjo, H. Watanabe (Eds.), Springer, Berlin
    • D. Dijkkamp, E.J. van Loenen, H.B. Elswijk, in: A. Yoshimori, T. Shinjo, H. Watanabe (Eds.), Ordering at Surfaces and Interfaces, Springer Series in Materials Science, Vol. 17, Springer, Berlin, 1992, p. 85.
    • (1992) Springer Series in Materials Science , vol.17 , pp. 85
    • Dijkkamp, D.1    Van Loenen, E.J.2    Elswijk, H.B.3
  • 11
    • 85033108384 scopus 로고    scopus 로고
    • note
    • The calculations of Yamasaki et al. indicate that the activation energy for dimer formation is approximately equal to the activation energy for monomer diffusion; when two diffusing monomers meet, there is no additional energy barrier to dimer formation [9]. Once formed, the dimers are quite stable, as demonstrated in Section 3.
  • 12
    • 85033102773 scopus 로고    scopus 로고
    • note
    • Because a measurement of the free-terrace hop rate is desired, only sites that are not adjacent to surface features are included in the analysis.
  • 13
    • 85033102303 scopus 로고    scopus 로고
    • note
    • The asymmetric uncertainty in the room-temperature rate is caused by the application of Poisson statistics to the small number of events observed.
  • 14
    • 0000997079 scopus 로고
    • Y.-W. Mo, Science 261 (1993) 886.
    • (1993) Science , vol.261 , pp. 886
    • Mo, Y.-W.1
  • 16
    • 85033117676 scopus 로고    scopus 로고
    • note
    • A test confirmed that at high temperature, the hop rate is insensitive to tip field variations. For a sample biased (1 V with respect to the tip, variation of the tunneling current from 0.03 to 0.2 nA produced only negligible changes in the hop rate at ∼460 K. All STM images and tracking data were acquired at bias magnitudes ranging from 0.5 to 2.5 V and a tunneling current of ∼0.05 nA.
  • 17
    • 0002407010 scopus 로고
    • The fitting algorithm (York's method) ensures that the parameters and their uncertainties correctly reflect the uncertainties in the rates and in the temperatures
    • B.C. Reed, Am. J. Phys. 60 (1992) 59. The fitting algorithm (York's method) ensures that the parameters and their uncertainties correctly reflect the uncertainties in the rates and in the temperatures.
    • (1992) Am. J. Phys. , vol.60 , pp. 59
    • Reed, B.C.1
  • 18
    • 85033106471 scopus 로고    scopus 로고
    • private communication. Preliminary results for one of the atomic exchange pathways yield 1.28 eV for the activation energy for diffusion; another pathway, the validity of which is currently being checked, may have an even lower energy
    • K. Terakura (private communication). Preliminary results for one of the atomic exchange pathways yield 1.28 eV for the activation energy for diffusion; another pathway, the validity of which is currently being checked, may have an even lower energy.
    • Terakura, K.1
  • 19
    • 85033105521 scopus 로고    scopus 로고
    • note
    • The thermocouple on the sample also allowed us to verify that the probe does not alter the sample temperature by more than 1 K during a normal probe measurement. Even when the probe and sample temperatures differed by 115 K, an unrealistically large mismatch, the sample temperature did not change more than 3 K.
  • 23
    • 85033123112 scopus 로고    scopus 로고
    • note
    • We recently obtained a preprint of a more extensive experiment by Swartzentruber, in which the dimer free-energy surface in the vicinity of a variety of surface features is mapped out. He measures a free-energy decrease of 50 ± 15 meV at a site bordering a type-A step.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.