Formation of heavy d-electron quasiparticles in Sr<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>
- Allan, M.
- Tamai, A.
- Rozbicki, E.
- Fischer, M.
- Voss, J.
- King, P.
- Meevasana, W.
- Thirupathaiah, S.
- Rienks, E.
- Fink, J.
- Tennant, D.
- Perry, R.
- Mercure, J.
- Wang, M.
- Lee, J.
- Fennie, C.
- Kim, E.
- Lawler, M.
- Shen, K.
- Mackenzie, A.
- Shen, Z.
- Baumberger, F.
DOIAbstract
The phase diagram of Sr3Ru2O7 shows hallmarks of strong electron correlations despite the modest Coulomb interaction in the Ru 4d shell. We use angle-resolved photoelectron spectroscopy measurements to provide microscopic insight into the formation of the strongly renormalized heavy d-electron liquid that controls the physics of Sr3Ru2O7. Our data reveal 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 quantitatively with a characteristic thermodynamic energy scale associated with quantum criticality and illustrate how it arises from a combination of back-folding due to a structural disto...
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