Anomalous roughening of curvature-driven growth with a variable interface window.
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.
Chen
Yong-Jun
YJ
Department of Physics, Kyoto University, Japan.
Nagamine
Yuko
Y
Yamaguchi
Tomohiko
T
Yoshikawa
Kenichi
K