Non-quadratic transverse magnetoresistance in the nodal line Dirac semimetal InBi

The transverse magnetoresistance of the nodal line Dirac semimetal InBi has been studied. It is found that the magnetoresistance is not quadratic. In the region of small magnetic fields $B \leqslant 0.1$ T, it is characterized by high curvature, in the region of medium magnetic fields it is described by the sum of linear and quadratic contributions, and in the region of large magnetic fields $B \geqslant 0.1$ T, it approaches a quadratic law with a curvature several times smaller its zero field value. A phenomenological equation is proposed that allows describing the entire dependence of the resistance on the magnetic field with an error not exceeding the measurement error of several percent.