Formation of heavy d-electron quasiparticles in Sr<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>
Formation of heavy d-electron quasiparticles in Sr<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>
We report angle-resolved photoelectron spectroscopy measurements of the quantum critical metal Sr3Ru2O7 revealing itinerant Ru 4d-states confined over large parts of the Brillouin zone to an energy range of < 6 meV, nearly three orders of magnitude lower than the bare band width. We show that this energy scale agrees …