1205.6674 (Xiao-Mei Kuang et al.)

Dipole Coupling Effect of Holographic Fermion in the Background of
Charged Gauss-Bonnet AdS Black Hole    [PDF]

Xiao-Mei Kuang, Bin Wang, Jian-Pin Wu

We investigate the holographic fermions in the charged Gauss-Bonnet $AdS_{d}$ black hole background with the dipole coupling between fermion and gauge field in the bulk. We show that in addition to the strength of the dipole coupling, the higher curvature correction in the gravity background and spacetime dimension also influence the onset of the Fermi gap and the gap distance. We find that the higher curvature effect modifies the fermion spectral density and influences the value of the Fermi momentum for the appearance of the Fermi surface. The dimensional influence on the Fermi momentum is also disclosed. We observe richer physics in the boundary fermion system reflected by the modification in the bulk gravity.

View original: http://arxiv.org/abs/1205.6674