Abstract
We measure the gate voltage () dependence of the superconducting properties and the spin-orbit interaction in the (111)-oriented interface. Superconductivity is observed in a dome-shaped region in the carrier density-temperature phase diagram with the maxima of superconducting transition temperature and the upper critical fields lying at the same . The spin-orbit interaction determined from the superconducting parameters and confirmed by weak-antilocalization measurements follows the same gate voltage dependence as . The correlation between the superconductivity and spin-orbit interaction as well as the enhancement of the parallel upper critical field, well beyond the Chandrasekhar-Clogston limit, suggest that superconductivity and the spin-orbit interaction are linked in a nontrivial fashion. We propose possible scenarios to explain this unconventional behavior.
- Received 6 June 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.237002
© 2017 American Physical Society