title: Anomalous roughening of curvature-driven growth with a variable interface window.
abstract: We studied the curvature-driven roughening of a disk domain pattern with a variable interface window. The relaxation of interface is driven by negative "surface tension." When a domain boundary propagates radially at a constant rate, we found that evolution of interface roughness follows scaling dynamic behavior. The local growth exponents are substantially different from the global exponents. Curvature-driven roughening belongs to a new class of anomalous roughening dynamics. However, a different "surface tension" leads to different global exponents. This is different from that of interface evolution with a fixed-size window, which has universal exponent. The variable growth window leads to a class of anomalous roughening dynamics.
authors.affiliation: Department of Physics, Kyoto University, Japan.
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Chen
authors.forename: Yuko
authors.initials: Y
authors.lastname: Nagamine
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yoshikawa