Speaker
Description
High temperature superconductivity, colossal magneto-resistance and many other intriguing phenomena in correlated electron physics arise in doped Mott insulators. Here, we present the first angle-resolved photoemission (ARPES) study of electron-doped Ca$_{2}$RuO$_{4}$. The undoped parent compound of our study has been investigated intensely as a model system of a multi-band Mott transition. Our ARPES data reveal a coherent Fermi surface at doping levels as low as 0.11. In contrast to cuprates or iridates, the emergent metallic state is characterized by heavy quasiparticle bands devoid of a pseudogap. These results show that key-properties of doped cuprates and iridates, such as the momentum dependent pseudogap are not universal features of doped Mott insulators.
