2004/03/23 by C. W. Schneider, Schneider, C. W., G. Hammerl +11
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0403595
15 pages, 4 Figures
arxiv created 2004/03/23 · openalex publication_date 2004/03/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The current-voltage characteristics of Superconducting Quantum Interference Devices (SQUIDs) are known to modulate as a function of applied magnetic field with a period of one flux quantum Φ0=h/2e. Here we report on the fabrication and properties of SQUIDs modulating with a period of 1/2×Φ0. The characteristics of these bicrystal SQUIDs are consistent with either a strong sin(2ϕ) component of the current-phase relation of the Josephson current, or with an interaction between the Cooper-pairs, causing an admixture of quartets to the condensate.