Cadmium arsenide (Cd₃As₂) is a Dirac semimetal intensively investigated in the last decade due to its stability and high mobility. Cd₃As₂ shows large negative magnetoresistance (NMR) over a wide range of magnetic field. Such NMR has been analysed in the framework of localized magnetic field and quantum interference theories. At low magnetic fields, quantum interference theory is consistent with the experimental data which can be described by variable range hopping (VRH) in the presence of a soft Coulomb gap (Efros–Shklovskii VRH). On the other hand, at moderate magnetic fields, the data are well described by the localized magnetic moment theory and the NMR is well approximated by the Langevin function.

砷化镉 (Cd ₃ As ₂ ) 是一种狄拉克半金属，由于其稳定性和高迁移率，在过去十年中得到了深入研究。Cd ₃ As ₂在很宽的磁场范围内显示出大的负磁阻（NMR）。这种核磁共振已在局域磁场和量子干涉理论的框架内进行了分析。在低磁场下，量子干涉理论与在软库仑间隙 (Efros-Shklovskii VRH) 存在下可以通过可变距离跳跃 (VRH) 描述的实验数据一致。另一方面，在中等磁场下，局部磁矩理论很好地描述了数据，而朗之万​​函数很好地近似了 NMR。