We investigate proximity induced superconductivity in micrometer-long bismuthnanowires con- nected to superconducting electrodes with a high critical field.At low temperature we measure a supercurrent that persists in magnetic fieldsas high as the critical field of the electrodes (above 11 T). The criticalcurrent is also strongly modulated by the magnetic field. In certain samples wefind regular, rapid SQUID-like periodic oscillations occurring up to highfields. Other samples ex- hibit less periodic but full modulations of thecritical current on Tesla field scales, with field-caused extinctions of thesupercurrent. These findings indicate the existence of low dimensionally, phasecoherent, interfering conducting regions through the samples, with a subtleinterplay between orbital and spin contributions. We relate these surprisingresults to the electronic properties of the surface states of bismuth, strongRashba spin-orbit coupling, large effective g factors, and their effect on theinduced superconducting correlations.
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