Magnetism in a Promising Topological Superconductor Nb$_{\mathrm{0.25}}$Bi$_{\mathrm{2}}$Se$_{\mathrm{3}}$

Nb$_{\mathrm{x}}$Bi$_{\mathrm{2}}$Se$_{\mathrm{3}}$ was found to be a promising candidate of topological superconductor [1]. In addition to its superconductivity, Nb$_{\mathrm{x}}$Bi$_{\mathrm{2}}$Se$_{\mathrm{3}}$ also depicts paramagnetism. Not only do the magnetism and superconductivity coexist but they also mutually assist each other to give rise to a state which could be well described as a symbiosis of the two phases. The emergent of the symbiotic state can have exotic phenomenon[1,2]. We will report the magnetic and the transport properties for this promising topological superconductor in this presentation. [1] Y. Qiu \textit{et. al.}, arXiv: 1512.03519. [2] F. Q. Noah, W.-Y. He, and K. T. Law, arXiv: 1608.05825.