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Unification of step bunching phenomena on vicinal surfaces

Fok, Pak-Wing and Rosales, Rodolfo R. and Margetis, Dionisios (2007) Unification of step bunching phenomena on vicinal surfaces. Physical Review B, 76 (3). Art. No. 033408. ISSN 1098-0121.

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We unify step bunching (SB) instabilities occurring under various conditions on crystal surfaces below roughening. We show that when attachment-detachment of atoms at step edges is the rate-limiting process, the SB of interacting, concentric circular steps is equivalent to the commonly observed SB of interacting straight steps under deposition, desorption, or drift. We derive a continuum Lagrangian partial differential equation, which is used to study the onset of instabilities for circular steps. These findings place on a common ground SB instabilities from numerical simulations for circular steps and experimental observations of straight steps.

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Fok, Pak-Wing0000-0001-9655-614X
Additional Information:© 2007 The American Physical Society (Received 5 May 2005; published 12 July 2007)
Subject Keywords:surface structure; partial differential equations; desorption
Issue or Number:3
Record Number:CaltechAUTHORS:FOKprb07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8491
Deposited By: Archive Administrator
Deposited On:15 Aug 2007
Last Modified:02 Oct 2019 23:51

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