Fermi surface and van Hove singularities in the itinerant metamagnet Sr3Ru2O7

Abstract

The low-energy electronic structure of the itinerant metamagnet Sr3Ru2O7 is investigated by angle resolved photoemission and density functional calculations. We find well-defined quasiparticle bands with resolution limited line widths and Fermi velocities up to an order of magnitude lower than in single layer Sr2RuO4. The complete topography, the cyclotron masses and the orbital character of the Fermi surface are determined, in agreement with bulk sensitive de Haas - van Alphen measurements. An analysis of the dxy band dispersion reveals a complex density of states including van Hove singularities (vHs) near the Fermi level; a situation which is favorable for magnetic instabilities.

5 pages, 3 figures, to appear in Phys. Rev. Lett

References in corpus (5)

• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Metamagnetism of itinerant electrons in multi-layer ruthenates
• Metamagnetic quantum criticality in Sr3Ru2O7 studied by thermal expansion
• Local Tunneling Spectroscopy across a Metamagnetic Critical Point in the Bi-layer Ruthenate Sr3Ru2O7
• Charge instabilities at the metamagnetic transition

Cited by in corpus (2)

• Unconventional metamagnetic electron states in orbital band systems
• Spectroscopic Imaging Scanning Tunneling Microscopy as a Probe of Orbital Structures and Ordering