TY - JOUR
T1 - Intermittence and roughening of periodic elastic media
AU - Seppälä, Eira T.
AU - Alava, M.J.
AU - Duxbury, P.M.
PY - 2001
Y1 - 2001
N2 - We analyze intermittence and roughening of an elastic interface or domain wall pinned in a periodic potential, in the presence of random-bond disorder in 1+1 and 2+1 dimensions. Though the ensemble average behavior is smooth, the typical behavior of a large sample is intermittent, and does not self-average to a smooth behavior. Instead, large fluctuations occur in the mean location of the interface and the onset of interface roughening is via an extensive fluctuation which leads to a jump in the roughness of order λ, the period of the potential. Analytical arguments based on extreme statistics are given for the number of the minima of the periodicity visited by the interface and for the roughening crossover, which is confirmed by extensive exact ground state calculations.
AB - We analyze intermittence and roughening of an elastic interface or domain wall pinned in a periodic potential, in the presence of random-bond disorder in 1+1 and 2+1 dimensions. Though the ensemble average behavior is smooth, the typical behavior of a large sample is intermittent, and does not self-average to a smooth behavior. Instead, large fluctuations occur in the mean location of the interface and the onset of interface roughening is via an extensive fluctuation which leads to a jump in the roughness of order λ, the period of the potential. Analytical arguments based on extreme statistics are given for the number of the minima of the periodicity visited by the interface and for the roughening crossover, which is confirmed by extensive exact ground state calculations.
KW - interface and surface thermodynamics
KW - interface structure and roughness
KW - optimization
KW - random magnets
KW - interface and surface thermodynamics
KW - interface structure and roughness
KW - optimization
KW - random magnets
KW - interface and surface thermodynamics
KW - interface structure and roughness
KW - optimization
KW - random magnets
U2 - 10.1103/PhysRevE.63.036126
DO - 10.1103/PhysRevE.63.036126
M3 - Article
VL - 63
SP - 1
EP - 7
JO - Physical Review E
JF - Physical Review E
SN - 2470-0045
IS - 3
M1 - 036126
ER -