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Ratchet Effect in Surface Electromigration: Smoothing Surfaces by an ac Field | | Imre Derenyi
; Choongseop Lee
; Albert-Laszlo Barabasi
; | | Date: |
2 Mar 1998 | | Journal: | Phys. Rev. Lett. 80, 1473 (1998) | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We demonstrate that for surfaces that have a nonzero Schwoebel barrier the application of an ac field parallel to the surface induces a net electro- migration current that points in the descending step direction. The magnitude of the current is calculated analytically and compared with Monte Carlo simulations. Since a downhill current smoothes the surface, our results imply that the application of ac fields can aid the smoothing process during annealing and can slow or eliminate the Schwoebel-barrier-induced mound formation during growth. | | Source: | arXiv, cond-mat/9803028 | | Services: | Forum | Review | PDF | Favorites | |
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