Edge superconducting state in Nb thin film with rectangular arrays of antidots

• Published in: arXiv.org
• Main Authors: Zhang, W J, He, S K, Liu, H F, Xue, G M, Xiao, H, Li, B H, Wen, Z C, Han, X F, Zhao, S P, Gu, C Z, Qiu, X G, Moshchalkov, Victor V
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 02.03.2012
• Subjects: Antidots; Crossovers; Magnetic fields; Magnetism; Magnetoresistance; Magnetoresistivity; Physics - Mesoscale and Nanoscale Physics; Superconductivity; Thin films; Unit cell
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1203.0269

Superconducting Nb thin films with rectangular arrays of submicron antidots have been systemically investigated by transport measurements. In low fields, the magnetoresistance curves demonstrate well-defined dips at integral and rational numbers of flux quanta per unit cell, which corresponds to a superconducting wire network-like regime. When the magnetic field is higher than a saturation field, interstitial vortices interrupt the collective oscillation in low fields and form vortex sublattice, where a larger magnetic field interval is observed. In higher fields, a crossover behavior from the interstitial sublattice state to a single-loop-like state is observed, characterized by oscillations with a period of \(\Phi_0/\pi r_{eff}^2\), originating from the existence of edge superconducting states with a size \(r_{eff}\) around the antidots.