Ratchet effect in surface electromigration: Smoothing surfaces by an ac field

Imre Derényi; Choongseop Lee; Albert László Barabási

doi:10.1103/PhysRevLett.80.1473

Ratchet effect in surface electromigration: Smoothing surfaces by an ac field

Imre Derényi, Choongseop Lee, Albert László Barabási^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract (may include machine translation)

We demonstrate that for surfaces that have a nonzero Schwoebel barrier the application of an ac field parallel to the surface induces a net electromigration 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.

Original language	English
Pages (from-to)	1473-1476
Number of pages	4
Journal	Physical Review Letters
Volume	80
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.80.1473
State	Published - 16 Feb 1998
Externally published	Yes

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10.1103/PhysRevLett.80.1473

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title = "Ratchet effect in surface electromigration: Smoothing surfaces by an ac field",

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 electromigration 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.",

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AU - Barabási, Albert László

PY - 1998/2/16

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N2 - We demonstrate that for surfaces that have a nonzero Schwoebel barrier the application of an ac field parallel to the surface induces a net electromigration 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.

AB - We demonstrate that for surfaces that have a nonzero Schwoebel barrier the application of an ac field parallel to the surface induces a net electromigration 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.

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Ratchet effect in surface electromigration: Smoothing surfaces by an ac field

Abstract (may include machine translation)

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