Physics – Condensed Matter – Superconductivity
Scientific paper
2007-04-16
Physics
Condensed Matter
Superconductivity
accepted to Physica C Ref. No.: PHYSC-D-06-00244R1
Scientific paper
We discuss the local and nonlocal dissipation effects on the existence of the global phase coherence transitions in two dimensional Josephson-coupled junctions. The quantum phase transitions are also examined for various lattice geometries: square, triangular and honeycomb. The T=0 superconductor-insulator phase transition is analyzed as a function of several control parameters which include self-capacitance and junction capacitance and both local and nonlocal dissipation effects. We found the critical value of the nonlocal dissipation parameter \alpha_{1} depends on a geometry of the lattice. The critical value of the normal state conductance seems to be difficult to obtain experimentally if we take into consideration different damping mechanisms which are presented in real physical systems.
Kopec Tadeusz. K.
Polak T. P.
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