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Superconductor/normal conductor/superconductor (SNS) Josephson junctions withhighly transparent interfaces are predicted to show significant deviations fromsinusoidal supercurrent-phase relationships (CPR) at low temperatures. Weinvestigate experimentally the CPR of a ballistic Nb/InAs(2DES)/Nb junction inthe temperature range from 1.3 K to 9 K using a modified Rifkin-Deaver method.The CPR is obtained from the inductance of the phase-biased junction. Transportmeasurements complement the investigation. At low temperatures, substantialdeviations of the CPR from conventional tunnel-junction behavior have beenobserved. A theoretical model yielding good agreement to the data is presented.Comment: RevTex4, 4 pages including 3 figure

physical review. b, condensed matter and materials physics

Supercurrent-phase relationship of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Nb</mml:mi><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">In</mml:mi><mml:mi mathvariant="normal">As</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mi>DES</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">Nb</mml:mi></mml:mrow></mml:math>Josephson junction in overlapping geometry

Supercurrent-phase relationship of aNb∕InAs(2DES)∕NbJosephson junction in overlapping geometry