D.
Yue
Gong, X. X., Kargarian, M. ., Stern, A. ., Yue, D. ., Zhou, H. X., Jin, X. F., … Xia, J. . (2017). Time-reversal symmetry-breaking superconductivity in epitaxial bismuth/nickel bilayers. Science Advances, 3. http://doi.org/10.1126/sciadv.1602579