Phase coexistence at the first-order Mott-transition revealed by pressure-dependent dielectric spectroscopy of $\kappa$-(BEDT-TTF)${}_2$Cu${}_2$(CN)${}_3$

R. Rösslhuber, A. Pustogow, E. Uykur +7

The dimer Mott insulator $\kappa$-(BEDT-TTF)${}_2$Cu${}_2$(CN)${}_3$ can be tuned into a metallic and superconducting state upon applying pressure of 1.5 kbar and more. We have performed diel…