Van Hove singularity and spontaneous Fermi surface symmetry breaking in Sr3Ru2O7

Abstract

The most salient features observed around a metamagnetic transition in Sr3Ru2O7 are well captured in a simple model for spontaneous Fermi surface symmetry breaking under a magnetic field, without invoking a putative quantum critical point. The Fermi surface symmetry breaking happens in both a majority and a minority spin band but with a different magnitude of the order parameter, when either band is tuned close to van Hove filling by the magnetic field. The transition is second order for high temperature T and changes into first order for low T. The first order transition is accompanied by a metamagnetic transition. The uniform magnetic susceptibility and the specific heat coefficient show strong T dependence, especially a log T divergence at van Hove filling. The Fermi surface instability then cuts off such non-Fermi liquid behavior and gives rise to a cusp in the susceptibility and a specific heat jump at the transition temperature.

11 pages, 4 figures

References in corpus (6)

• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Formation of Electronic Nematic Phase in Interacting Systems
• Metamagnetism of itinerant electrons in multi-layer ruthenates
• Metamagnetic quantum criticality in Sr3Ru2O7 studied by thermal expansion
• Spontaneous breaking of the Fermi surface symmetry in the t-J model: a numerical study
• Charge instabilities at the metamagnetic transition

Cited by in corpus (6)

• Unconventional metamagnetic electron states in orbital band systems
• Spectroscopic Imaging Scanning Tunneling Microscopy as a Probe of Orbital Structures and Ordering
• Effect of magnetic field on spontaneous Fermi surface symmetry breaking
• Fermi Liquid instabilities in two-dimensional lattice models
• Self-masking of spontaneous symmetry breaking in layer materials
• Quasiparticle properties of strongly correlated electron systems with itinerant metamagnetic behavior