10.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT156 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT146 papers
- University of InsubriaIT88 papers
- University of MilanIT85 papers
- University of TrentoIT85 papers
- Politecnico di TorinoIT78 papers
- University of FlorenceIT74 papers
- University of GenoaIT69 papers
- Centre National de la Recherche ScientifiqueFR65 papers
- The Abdus Salam International Centre for Theoretical Physics (ICTP)IT65 papers
- National Research CouncilLK58 papers
- University of SalernoIT56 papers
107 papers · 1 filter
Bandstructure and Fermi Surfaces of CeRh3B2
Kunihiko Yamauchi, Akira Yanase, Hisatomo Harima
The electronic bandstructure and the Fermi surfaces of ferromagnetic CeRh3B2 are calculated by using FLAPW and LSDA+U method. As assuming several kinds of the ground state to descr…
Neutral modes edge state dynamics through quantum point contacts
Dario Ferraro, Alessandro Braggio, Nicodemo Magnoli +1
Dynamics of neutral modes for fractional quantum Hall states is investigated for a quantum point contact geometry in the weak-backscattering regime. The effective field theory intr…
Theoretical prediction of multiferroicity in double perovskite YNiMnO
Sanjeev Kumar, Gianluca Giovannetti, Jeroen van den Brink +1
We put forward double perovskites of the RNiMnO family (with a rare-earth atom) as a new class of multiferroics on the basis of {\it ab initio} density functional calcu…
Multiferroicity in rare-earth nickelates RNiO3
Gianluca Giovannetti, Sanjeev Kumar, Daniel Khomskii +2
We show that charge ordered rare-earth nickelates of the type RNiO3 (R= Ho, Lu, Pr and Nd) are multiferroic with very large magnetically induced ferroelectric (FE) polarizations. T…
When finite-size corrections vanish: The S=1/2 XXZ model and the Razumov-Stroganov state
Leonardo Banchi, Filippo Colomo, Paola Verrucchi
We study the one-dimensional XXZ model on a finite lattice at zero temperature, varying the exchange anisotropy and the number of sites of the lattice. Special emph…
Signatures of the super fluid-insulator phase transition in laser driven dissipative nonlinear cavity arrays
A. Tomadin, V. Giovannetti, R. Fazio +4
We analyze the non-equilibrium dynamics of a gas of interacting photons in an array of coupled dissipative nonlinear cavities driven by a pulsed external coherent field. Using a me…
Magnetic field induced non-Fermi liquid to Fermi liquid crossover at the quantum critical point of YbCuAu
P. Carretta, R. Pasero, M. Giovannini +1
The temperature (T) dependence of the muon and Cu nuclear spin-lattice relaxation rates in YbCu4.4Au0.6 is reported over nearly four decades. It is shown that for $T…
Magnetically-induced ferroelectricity in orthorhombic manganites: microscopic origin and chemical trends
Kunihiko Yamauchi, Frank Freimuth, Stefan Blügel +1
The microscopic origin of the magnetically-driven ferroelectricity in collinear AFM-E orthorhombic manganites is explained by means of first-principles Wannier functions. We show t…
Polaronic features in the optical properties of the Holstein-t-J model
E. Cappelluti, S. Ciuchi, S. Fratini
We derive the exact solution for the optical conductivity of one hole in the Holstein-t-J model in the framework of dynamical mean-field theory (DMFT). We investigate the ma…
Finite Drude weight for 1D low temperature conductors
Dariush Heidarian, Sandro Sorella
We apply well established finite temperature Quantum Monte Carlo techniques to one dimensional Bose systems with soft and hardcore constraint, as well as to spinless fermion system…
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…
Screening effects in Coulomb frustrated phase separation
C. Ortix, J. Lorenzana, M. Beccaria +1
We solve a model of phase separation among two competing phases frustrated by the long-range Coulomb interaction in two and three dimensions (2D/3D) taking into account finite comp…
One-Particle Anomalous Excitations of Gutzwiller Projected BCS Superconductors and Bogoliubov Quasi-Particle Characteristics
Seiji Yunoki
Low-lying one-particle anomalous excitations are studied for Gutzwiller projected strongly correlated BCS states. It is found that the one-particle anomalous excitations are highly…
Two spin liquid phases in the spatially anisotropic triangular Heisenberg model
Seiji Yunoki, Sandro Sorella
The quantum spin-1/2 antiferromagnetic Heisenberg model on a two dimensional triangular lattice geometry with spatial anisotropy is relevant to describe materials like ${\rm Cs_2 C…
Enhancement of Wigner crystallization in quasi low-dimensional solids
G. Rastelli, P. Quemerais, S. Fratini
The crystallization of electrons in quasi low-dimensional solids is studied in a model which retains the full three-dimensional nature of the Coulomb interactions. We show that res…
Optical properties of small polarons from dynamical mean-field theory
S. Fratini, S. Ciuchi
The optical properties of polarons are studied in the framework of the Holstein model by applying the dynamical mean-field theory. This approach allows to enlighten important quant…
Spectral properties and isotope effect in strongly interacting systems: Mott-Hubbard insulator and polaronic semiconductor
S. Fratini, S. Ciuchi
We study the electronic spectral properties in two examples of strongly interacting systems: a Mott-Hubbard insulator with additional electron-boson interactions, and a polaronic s…
Pairing and polarization in systems with retarded interactions
S. Ciuchi, G. Sangiovanni, M. Capone
In a system where a boson (e.g, a phonon) of finite frequency is coupled to electrons, two phenomena occur as the coupling is increased: electron pairing and polarization of…
Pressure dependence of superconducting and magnetic critical temperatures in the ruthenocuprates
R. Citro, G. G. N. Angilella, M. Marinaro +1
We study the dependence on filling and pressure of the superconducting and ferromagnetic critical temperatures of the ruthenocuprates, within the two-band model. At zero pressure,…
Quantum Heisenberg antiferromagnets: a survey of the activity in Firenze
Umberto Balucani, Luca Capriotti, Alessandro Cuccoli +5
Over the years the research group in Firenze has produced a number of theoretical results concerning the statistical mechanics of quantum antiferromagnetic models, which range from…
Role of strong correlation in the recent ARPES experiments for cuprate superconductors
S. Yunoki, E. Dagotto, S. Sorella
Motivated by recent photoemission experiments on cuprates, the low-lying excitations of a strongly correlated superconducting state are studied numerically. It is observed that alo…
Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations II: transport properties
V. P. Gusynin, S. G. Sharapov
The quantum magnetic oscillations of electrical (Shubnikov de Haas effect) and thermal conductivities are studied for graphene which represents a distinctive example of planar syst…
A model dielectric response function for metallic nanotube ropes
J. V. Alvarez, G. G. N. Angilella
We propose a model dielectric function for ropes of single-walled nanotubes distributed in a glassy graphite host medium. We study the significance of the bosonic charge excitation…
The one-dimensional t-J model coupled to adiabatic phonons: A numerical investigation
Samuele Bissola, Alberto Parola
The ground state of the one-dimensional t-J model coupled with phonons in the adiabatic limit is numerically investigated by use of the Lanczos technique at quarter filling. Due to…