Decay characteristics of two-dimensional islands on strongly anisotropic surfaces

Article

关键词: INTERLAYER MASS-TRANSPORT;    ADATOM ISLANDS;    DIFFUSION;    MOUNDS;    CU(111);    AG(110);    MOTION;    AG;   

DOI  :  10.1103/PhysRevB.66.041407

来源: SCIE

【 摘 要 】

We investigate analytically the decay characteristics of two-dimensional islands on strongly anisotropic surfaces. We show that a generic scaling law can always be established in describing the dynamical evolution of such islands, given by Lproportional to(t(0)-t)(beta), where L is the island width, and t(0) is the lifetime of the islands. The value of the scaling exponent beta in the fast-decay direction is always 1/2 in the low-temperature regime where the decay is quasi-one-directional, irrespective of the specific dominant decaying mechanism involved. At higher temperatures where the decay proceeds effectively in both directions, beta is again a good measure of the dominant microscopic decaying mechanism involved, just like the isotropic case. We discuss these results in connection with recent experiments.

【 授权许可】

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