We report observation of spin triplet superconductivity in epitaxial Bi/Ni bilayers with TC up to 4 K and 2Delta/kBTC = 12. Andreev reflection spectroscopy (ARS) with ballistic injection of unpolarized and spin-polarized electrons conclusively reveals spin triplet p-wave superconductivity. The gap structure measured by ARS in multiple crystal directions shows the ABM (Anderson-Brinkman-Morel) state, the same as that in superfluid 3He.
@article{arxiv.1810.10403,
title = {Triplet p-wave superconductivity with ABM state in epitaxial Bi/Ni bilayers},
author = {G. J. Zhao and X. X. Gong and J. C. He and J. A. Gifford and H. X. Zhou and Y. Chen and X. F. Jin and C. L. Chien and T. Y. Chen},
journal= {arXiv preprint arXiv:1810.10403},
year = {2018}
}