Observation of non-sinusoidal current-phase relation in graphene\n Josephson junctions

2013/05/01 by Christopher English, David P. Hamilton, English, Christopher +9 · 1 citation
Physics and Astronomy · #Quantum and electron transport phenomena #Topological Materials and Phenomena #Surface and Thin Film Phenomena

paper · pdf · doi:10.48550/arxiv.1305.0327

Abstract

We present direct measurements of the current-phase relation for lateral\nJosephson junctions with a graphene barrier, obtained by a phase-sensitive\nSQUID interferometry technique. We find that the current-phase relation is\nforward skewed with respect to the commonly observed sinusoidal behavior for\nshort junctions in the quasi-ballistic transport regime, consistent with\npredictions for the behavior of Dirac fermions in a Josephson junction. The\nskewness increases with critical current and decreases sharply with increasing\ntemperature.\n

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