Session W39: Superconductivity-Josephson Junctions and Qubits
2:30 PM–5:30 PM, Thursday, March 16, 2006
Baltimore Convention Center Room: 342
Sponsoring Unit: DCMP
Chair: J. Robert Anderson, University of Maryland
Abstract ID: BAPS.2006.MAR.W39.5
Abstract: W39.00005 : Vortex doping into finite-sized superconducting Pb networks.
3:18 PM–3:30 PM
(Osaka Prefecture University, Sakai, Osaka 599-8531)
(Osaka Prefectural College of Technology, Neyagawa, Osaka 572-8572)
(Graduate School of Information Sciences, Tohoku University, Sendai980-8579)
(Technology Research Institute of Osaka Prefecture, Izumi, Osaka 594-1157)
Superconducting finite-sized Pb square networks with 2x2, 3x3, 5x5 and 10x10 square holes have been fabricated by electron beam lithography of photoresist layer and a lift-off process after depositing Pb film on the resist patterns. The application of magnetic field corresponds to the particle (vortex) doping into networks. Vortex image observations were carried out by a SQUID microscope to compare with the theoretical predictions. We found the exactly reversed pattern between the vortex doping x and the anitivortex doping x into the fully occupied network (x=1/4). The Ginzburg-Landau calculations show that there are several vortex configurations with almost equivalent free energy. The complete coincidence of the two patterns might be due to residual randomness caused in the fabrication processes.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.MAR.W39.5