# Momentum dissipation and holographic transport without self-duality

The European Physical Journal C, Aug 2018

We explore the response of the momentum dissipation introduced by spatial linear axionic fields in a holographic model without self-duality, which is broke by Weyl tensor coupling to Maxwell field. It is found that for the positive Weyl coupling parameter $$\gamma >0$$, the momentum dissipation, characterized by parameter $${\hat{\alpha }}$$, drives an incoherent metallic state with a peak at low frequency into another incoherent metallic phase with a dip. While for $$\gamma <0$$, an oppositive scenario is observed. Another interesting feature in our model is that for some observables including the DC conductivity, diffusion constant and susceptibility, there exists a certain value of $${\hat{\alpha }}$$, for which these observables are independent of $$\gamma$$. Finally, the electromagnetic (EM) duality is also studied and there is also a specific value of $${\hat{\alpha }}$$, for which the particle-vortex duality related by the change of the sign of $$\gamma$$ in the boundary theory holds better than for other values of $${\hat{\alpha }}$$.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-6100-x.pdf

Jian-Pin Wu, Xiao-Mei Kuang, Guoyang Fu. Momentum dissipation and holographic transport without self-duality, The European Physical Journal C, 2018, 616, DOI: 10.1140/epjc/s10052-018-6100-x