  By employing the gauge/gravity duality, we disclose the effects of the
non-minimal coupling between the scalar and Maxwell fields on the holographic
superconductors in the probe limit. As the background spacetime, we consider a
five dimensional Gauss-Bonnet (GB) black hole with a flat horizon. We find out
that the critical temperature decreases for larger values of GB coupling
constant or smaller values of non-minimal coupling constant, which means that
the condensation is harder to form. In addition, we study the electrical
conductivity in the holographic setup. We show that at low frequency regime,
Kramers-Kronig relation connects both parts of conductivity to each other,
while at high frequency, two parts go up with constant slope.
