448 citations · 3.8k across the 112 of their papers we have counts for
29 papers · 1 filter
The charge density fluctuations and the Shrinking Fermi Liquid scenario for strange metallicity in cuprates
Sergio Caprara, Sauri Bhattacharyya, Carlo Di Castro +3
We interpret the strange metal (SM) properties of slightly overdoped cuprates in terms of the recently proposed Shrinking Fermi Liquid theory. This is based on the pervading presen…
Anomalous thermopower from the drag of overdamped collective modes
G. Mirarchi, G. Seibold, M. Grilli +1
Inspired by the observation of a Seebeck coefficient ratio that exhibits a seemingly logarithmic divergence at low temperature in high-temperature superconducting cuprates, we show…
Disorder-driven dissipative quantum criticality as a source of strange metal behavior
M. Grilli, C. Di Castro, G. Seibold +1
The strange metal behavior, usually characterized by a linear-in-temperature (T) resistivity, is a still unsolved mystery in solid-state physics. Usually it is associated with the…
Dissipation-driven strange metal behavior
S. Caprara, C. Di Castro, G. Mirarchi +2
Anomalous metallic properties are often observed in the proximity of quantum critical points (QCPs), with violation of the Fermi Liquid paradigm. We propose a scenario where, due t…
Raman response in the nematic phase of FeSe
Mattia Udina, Marco Grilli, Lara Benfatto +1
Raman experiments on bulk FeSe revealed that the low-frequency part of Raman response , which probes nematic fluctuations, rapidly decreases below the nematic…
Nematic fluctuations and the magneto-structural phase transition in
Florian Kretzschmar, Thomas Böhm, Una Karahasanović +11
An inelastic light (Raman) scattering study of nematicity and critical fluctuations in () is presented. It is shown that the respon…
Stripes in cuprate superconductors: Excitations and dynamic dichotomy
G. Seibold, M. Grilli, J. Lorenzana
We present a short account of the present experimental situation of stripes in cuprates followed by a review of our present understanding of their ground state and excited state pr…
Influence of correlations on transitive electron-phonon couplings in cuprate superconductors
G. Seibold, M. Grilli, J. Lorenzana
We investigate a model for the CuO_2 plane of high-T_c superconductors where the charge carriers are coupled to A_{1g} and B_{1g} symmetric out-of plane vibrations of the oxygen at…
Electron-phonon interaction in Strongly Correlated Systems
M. Capone, C. Castellani, M. Grilli
The Hubbard-Holstein model is a simple model including both electron-phonon interaction and electron-electron correlations. We review a body of theoretical work investigating the e…
Phonon renormalization from local and transitive electron-lattice couplings in strongly correlated systems
E. von Oelsen, A. Di Ciolo, J. Lorenzana +2
Within the time-dependent Gutzwiller approximation (TDGA) applied to Holstein- and SSH-Hubbard models we study the influence of electron correlations on the phonon self-energy. For…
Fermi surface dichotomy on systems with fluctuating order
M. Grilli, G. Seibold, A. Di Ciolo +1
We investigate the effect of a dynamical collective mode coupled with quasiparticles at specific wavevectors only. This coupling describes the incipient tendency to order and produ…
Charge instabilities and electron-phonon interaction in the Hubbard-Holstein model
A. Di Ciolo, J. Lorenzana, M. Grilli +1
We consider the Hubbard-Holstein model in the adiabatic limit to investigate the effects of electron-electron interactions on the electron-phonon coupling. To this aim we compute a…
Disordered loops in the two-dimensional antiferromagnetic spin-fermion model
Tilman Enss, Sergio Caprara, Claudio Castellani +2
The spin-fermion model has long been used to describe the quantum-critical behavior of 2d electron systems near an antiferromagnetic (AFM) instability. Recently, the standard proce…
Charge inhomogeneity coexisting with large Fermi surfaces
A. Di Ciolo, M. Grilli, J. Lorenzana +1
We discuss how stripes in cuprates can be compatible with a Fermi-liquid-like Fermi surface and, at the same time, they give rise to a one-dimensional-like pseudo Fermi surface in…
Spectroscopic evidences of quantum critical charge fluctuations in cuprates
M. Grilli, S. Caprara, C. Di Castro +1
We calculate the optical conductivity in a clean system of quasiparticles coupled to charge-ordering collective modes. The absorption induced by these modes may produce an anomalou…
Checkerboard and stripe inhomogeneities in cuprates
G. Seibold, J. Lorenzana, M. Grilli
We systematically investigate charge-ordering phases by means of a restricted and unrestricted Gutzwiller approximation to the single-band Hubbard model with nearest () and next…
Effective electron-electron and electron-phonon interactions in the Hubbard-Holstein model
G. Aprea, C. Di Castro, M. Grilli +1
We investigate the interplay between the electron-electron and the electron-phonon interaction in the Hubbard-Holstein model. We implement the flow-equation method to investigate w…
Electron-phonon Interaction close to a Mott transition
G. Sangiovanni, M. Capone, C. Castellani +1
The effect of Holstein electron-phonon interaction on a Hubbard model close to a Mott-Hubbard transition at half-filling is investigated by means of Dynamical Mean-Field Theory. We…
Phase Separation close to the density-driven Mott transition in the Hubbard-Holstein model
M. Capone, G. Sangiovanni, C. Castellani +2
The density driven Mott transition is studied by means of Dynamical Mean-Field Theory in the Hubbard-Holstein model, where the Hubbard term leading to the Mott transition is supple…
A large-N analysis of the local quantum critical point and the spin-liquid phase
S. Burdin, M. Grilli, D. R. Grempel
We study analytically the Kondo lattice model with an additional nearest-neighbor antiferromagnetic interaction in the framework of large-N theory. We find that there is a local qu…
First-Order Pairing Transition and Single-Particle Spectral Function in the Attractive Hubbard Model
M. Capone, C. Castellani, M. Grilli
A Dynamical Mean Field Theory analysis of the attractive Hubbard model is carried out. We focus on the normal state upon restricting to solutions where superconducting order is not…
Jahn-Teller, Charge and Magnetic Ordering in half-doped Manganese Oxides
S. Fratini, D. Feinberg, M. Grilli
The phase diagram of half-doped manganite systems of formula A_{0.5}A'_{0.5}MnO_3 is investigated within a single-orbital model incorporating magnetic double-exchange and superexch…
Stabilization of A-type layered antiferromagnetic phase in LaMnO_3 by cooperative Jahn-Teller deformations
M. Capone, D. Feinberg, M. Grilli
It is shown that the layered antiferromagnetic order in stoechiometric LaMnO_3 cannot be understood purely from electronic interactions. On the contrary, it mainly results from str…
Small polaron formation in many-particle states of the Hubbard-Holstein model: The one-dimensional case
Massimo Capone, Marco Grilli, Walter Stephan
We investigate polaron formation in a many-electron system in the presence of a local repulsion sufficiently strong to prevent local-bipolaron formation. Specifically, we consider…