hide
Free keywords:
-
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 linewidths 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 d(xy) band dispersion reveals a complex
density of states with van Hove singularities near the Fermi level, a
situation which is favorable for magnetic instabilities.
