Holographic interaction effects on transport in Dirac semimetals

Understand

Strongly interacting Dirac semimetals are investigated using a holographic model especially geared to compute the single-particle correlation function for this case, including both interaction effects and nonzero temperature.

• We calculate the (homogeneous) electrical conductivity at zero chemical potential, and show that it consists of two contributions.
• The interband contribution scales as a power law either in frequency or in temperature for low frequency.
• The precise power is related to a critical exponent of the dual holographic theory, which is a parameter in the model.