Why the critical temperature of high-$T_{\mathrm{c}}$ cuprate superconductors is so low: The importance of the dynamical vertex structure

Motoharu Kitatani, Thomas Schäfer, Hideo Aoki +1

To fathom the mechanism of high-temperature ($T_{\mathrm{c}}$) superconductivity, the dynamical vertex approximation (D$\Gamma$A) is evoked for the two-dimensional repulsive Hubbard model. A…