Fig. 4
From: Nematic topological superconducting phase in Nb-doped Bi2Se3
Dependence of Hc2, Hirr and the magnetization value on the in-plane magnetic field direction. a H c2 determined from the magnetization hysteresis loops at 1.8 K for Sample 2 (empty circles) and Sample 3 (empty stars). The two additional datapoints (filled stars) are taken from magnetoresistance data of Sample 3 as a check of consistency between the two methods. b Irreversibility fields H irr of Sample 2 below which the hysteresis loops open. c Dependence of the magnetization in the initial zero-field-cooled branch at 8.5 mT on the in-plane orientation of the magnetic field (Sample 2). The inset shows the corresponding magnetization data for 0° and 101°. c Dependence of the thermodynamic contribution of the magnetization taken in the reversible regime above H irr at 0.32 T on the in-plane orientation of the magnetic field (Sample 2). The lines in all graphs correspond to a theoretical model of nematic superconductivity (see text for details)
