The circular photogalvanic effect in disordered Weyl semimetals

In a noninteracting chiral Weyl semimetal, the circular photogalvanic effect (CPGE) is quantized with a quantum due to band topology. We theoretically study the fate of this quantization in the presence of quenched short-range disorder. To calculate the non-linear response of the system, we utilize the kernel polynomial method via a triple expansion in terms of Chebyshev polynomials. Results will be presented on the CPGE in disordered Weyl semimetals on large system sizes, where non-perturbative rare region effects and the stability of the quantization are explored.