Anisotropic superconductivity and elongated vortices with unusual bound states in quasi-one-dimensional nickel-bismuth compounds

26 Apr 2018 Wang Wen-Lin Zhang Yi-Min Lv Yan-Feng Ding Hao Wang Lili Li Wei He Ke Song Can-Li Ma Xu-Cun Xue Qi-Kun

We report low temperature scanning tunneling microscopy and spectroscopy studies of Ni-Bi films grown by molecular beam epitaxy. Highly anisotropic and twofold symmetric superconducting gaps are revealed in two distinct composites, Bi-rich NiBi3 and near-equimolar NixBi, both sharing quasi-one-dimensional crystal structure... (read more)

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