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Volumn 53, Issue 23, 1996, Pages 15991-15996

Fluctuation kinetics of an isolated Ag(110) step

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EID: 0001560292     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.53.15991     Document Type: Article
Times cited : (40)

References (30)
  • 24
    • 0000275557 scopus 로고    scopus 로고
    • Recent studies by R. Berndt et. al Phys. Rev. Lett. 76, 1888 (1996), found tip-induced Ag diffusion on the (110) surface with a tunneling voltage ∼0.37 V and 10 nA, corresponding to a tunneling gap resistance of ∼3.7×(Formula presented)Ω.
    • (1996) Phys. Rev. Lett. , vol.76 , pp. 1888
    • Berndt, R.1
  • 26
    • 0028495073 scopus 로고
    • The scaling behavior of equilibrium step fluctuations is valid under two conditions. First, the motion of the step should not be constrained by the neighboring steps. Second, the magnitude of the fluctuations must be of the order of several atomic spacings or larger. When these conditions are not satisfied, one needs to consider the microscopic details of fluctuation mechanisms [see M. Giesen-Seibert and H. Ibach, Surf. Sci. 316, 205 (1994)].
    • (1994) Surf. Sci. , vol.316 , pp. 205
    • Giesen-Seibert, M.1    Ibach, H.2
  • 28
    • 0026203583 scopus 로고
    • The diffusion-limited scenario occurs when the sticking coefficient S for attachment is large (Ref. 15). To estimate s, we use the adatom concentration of 0.05 ML estimated in the following paper, and assume the value of D∼(Formula presented)-(Formula presented)/s [see C. L. Liu, J. M. Cohen, J. B. Adams and A. F. Voter, Surf. Sci. 253, 334 (1991)]. The number of attempted hops onto the step edge would then be at least 4×(Formula presented)/s. From the observed attachment rate of 3/s, this implies a sticking coefficient of less than 7×(Formula presented). Such a small coefficient would only affect fluctuations of Fourier components greater than a wavelength of a/S (Ref. 15) (or 40 μm). Fluctuations of such long wavelength have much larger time constants (∼(Formula presented) s) than that of our experiment (∼10 s). Thus, given this scenario, it is unlikely that the small deviations from an exponent of are caused by terrace-limited diffusion. We thus suggest the small, but systematic, lowering of the time exponent is from the contribution of kink motions.
    • (1991) Surf. Sci. , vol.253 , pp. 334
    • Liu, C.1    Cohen, J.2    Adams, J.3    Voter, A.4


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.