Unexpected fourfold symmetry in the resistivity of patterned superconductors

Myriam Pannetier; Rinke J. Wijngaarden; Inge Fløan; Jan Rector; Bernard Dam; Ronald Griessen; Peter Lahl; Roger Wördenweber

doi:10.1103/PhysRevB.67.212501

Unexpected fourfold symmetry in the resistivity of patterned superconductors

Myriam Pannetier, Rinke J. Wijngaarden, Inge Fløan, Jan Rector, Bernard Dam, Ronald Griessen, Peter Lahl, Roger Wördenweber

DOI 10.1103/PhysRevB.67.212501 · Physical Review B

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Abstract

We report the magneto-optical observation of a surprising fourfold symmetry of the flux penetration in a superconducting YBa2Cu3O7−δ thin-film disk containing a square array of antidots, leading to an angular variation of the critical current by a factor of nearly 2. This behavior is explained using a vortex channeling model. Potential applications in superconducting devices are discussed

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown