Disorder Induced Dynamical Interband Response in Dirac Nodal Line Semimetals

To obtain the total response of the system, the effect of disorder cannot be neglected, as it introduces a new contribution (i.e., extrinsic) in the total response of the system. In the study of dynamical (AC) effects, the interband response exhibits an exotic resonance peak due to interband transitions. Herein, the dynamical interband response of the Dirac nodal line semimetal is investigated by using the quantum kinetic approach. The scattering‐driven effect is analyzed under the first‐order Born approximation (i.e., in the weak disorder limit) and reveals a resonance peak at . In contrast, the field‐driven intrinsic response peak depends on both the mass () and chemical potential (). The results indicate that the total interband response of the 3D nodal line semimetals is mainly dominated by the disorder‐induced contributions.