TY - JOUR
T1 - Nature of resistive transitions in josephson networks in a magnetic field
AU - Straley, Joseph P.
AU - Morozov, Alexander Y.
AU - Kolomeisky, Eugene B.
PY - 1997/9/29
Y1 - 1997/9/29
N2 - We study the depinning of the vortices induced in a Josephson network by a magnetic field. A vortex crystal can be pinned when it can be made commensurate with the network potential by rotation; this can occur only when the number of vortices per unit cell p/q is constructed from special values of the integers p and q. For these cases the transition can be of roughening type; however, melting of the vortex crystal is an important competing process that changes the nature of the transition for q < 16 (square lattice) or q < 12 (hexagonal lattice). For the other values of p and q there can be a spontaneous deformation of the vortex crystal to a commensurable structure if the network potential is sufficiently large.
AB - We study the depinning of the vortices induced in a Josephson network by a magnetic field. A vortex crystal can be pinned when it can be made commensurate with the network potential by rotation; this can occur only when the number of vortices per unit cell p/q is constructed from special values of the integers p and q. For these cases the transition can be of roughening type; however, melting of the vortex crystal is an important competing process that changes the nature of the transition for q < 16 (square lattice) or q < 12 (hexagonal lattice). For the other values of p and q there can be a spontaneous deformation of the vortex crystal to a commensurable structure if the network potential is sufficiently large.
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U2 - 10.1103/PhysRevLett.79.2534
DO - 10.1103/PhysRevLett.79.2534
M3 - Article
AN - SCOPUS:4243958075
VL - 79
SP - 2534
EP - 2537
IS - 13
ER -