A 2D top-contact fabrication scheme makes superconducting contacts to graphene gate-tunable in both polarity regimes, enabling transparent hole-side contacts and the first Andreev conversion signature at quantum Hall filling factor -2.
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Engineering superconducting contacts transparent to a bipolar graphene
A 2D top-contact fabrication scheme makes superconducting contacts to graphene gate-tunable in both polarity regimes, enabling transparent hole-side contacts and the first Andreev conversion signature at quantum Hall filling factor -2.