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- W2023882537 abstract "Highly transmissive, superconducting contacts of microm-scale have been made to the two-dimensional electron gas in GaAs/AlGaAs heterostructures, in combination with lateral gate structures. We present results of resistance measurements at T≈ 10 mK on a sample with a quantum point contact between two superconducting Sn/Ti contacts. New effects due to phase-coherent Andreev reflection have been observed. The conductance is found to be quantized with enhanced steps > 2e2/h, which is attributed to Andreev reflection. At zero gate voltage an enhancement of weak localization by Andreev reflection has been measured for the first time, while at a higher gate voltage indications of an excess conductance due to reflectionless tunneling have been found." @default.
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- W2023882537 date "1994-03-01" @default.
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- W2023882537 title "Influence of gate voltage on the transport properties of superconductor/2DEG systems" @default.
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- W2023882537 doi "https://doi.org/10.1016/0039-6028(94)90939-3" @default.
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