6 papers
Spin stiffness, spectral weight, and Landau damping of magnons in metallic spiral magnets
Pietro M. Bonetti, Walter Metzner
We analyze the properties of magnons in metallic electron systems with spiral magnetic order. Our analysis is based on the random phase approximation for the susceptibilities of ti…
Dynamical functional renormalization group computation of order parameters and critical temperatures in the two-dimensional Hubbard model
Demetrio Vilardi, Pietro M. Bonetti, Walter Metzner
We analyze the interplay of antiferromagnetism and pairing in the two dimensional Hubbard model with a moderate repulsive interaction. Coupled charge, magnetic and pairing fluctuat…
Quantum Effects in the Aubry Transition
Pietro Maria Bonetti, Andrea Rucci, Vladan Vuletic +1
The Aubry transition between sliding and pinned phases, driven by the competition between two incommensurate length scales, represents a paradigm that is applicable to a large vari…
Accessing the ordered phase of correlated Fermi systems: vertex bosonization and mean-field theory within the functional renormalization group
Pietro M. Bonetti
We present a consistent fusion of functional renormalization group and mean-field theory which explicitly introduces a bosonic field via a Hubbard-Stratonovich transformation at th…
Charge carrier drop at the onset of pseudogap behavior in the two-dimensional Hubbard model
Pietro M. Bonetti, Johannes Mitscherling, Demetrio Vilardi +1
We show that antiferromagnetic spin-density wave order in the two-dimensional Hubbard model yields a drop of the charge carrier density as observed in recent transport measurements…
Local-field Theory of the BCS-BEC Crossover
Pietro Maria Bonetti, Maria Luisa Chiofalo
We develop a self-consistent theory unifying the description of a quantum Fermi gas in the presence of a Fano-Feshbach resonance in the whole phase diagram ranging from BCS to BEC…