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
18 papers · 2 filters
On-Site Repulsion as the Source of Pairing in Carbon Nanotubes and Intercalated Graphite
Enrico Perfetto, Gianluca Stefanucci, Michele Cini
We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended H…
All-optical single-electron read-out devices based on GaN quantum dots
Irene D'Amico, Fausto Rossi
We study few-particle interactions in GaN-coupled quantum dots and discuss how the built-in field characteristic of these structures strongly reinforce dipole-dipole and dipole-mon…
Quantum Monte Carlo study of S=1/2 weakly-anisotropic antiferromagnets on the square lattice
Alessandro Cuccoli, Tommaso Roscilde, Valerio Tognetti +2
We study the finite-temperature behaviour of two-dimensional S=1/2 Heisenberg antiferromagnets with very weak easy-axis and easy-plane exchange anisotropies. By means of quantum Mo…
Quasiparticle bandstructure effects on the {\it d} hole lifetimes of copper within the GW approximation
Andrea Marini, Rodolfo Del Sole, Angel Rubio +1
We investigate the lifetime of {\it d} holes in copper within a {\it first--principle} approximation. At the level the lifetime of the topmost {\it d} bands are in ag…
Comment on "Phase Diagram of an Asymmetric Spin Ladder."
Luca Capriotti, Federico Becca, Sandro Sorella +1
A comment to the paper by S. Chen, H. Büttner, and J. Voit, [Phys. Rev. Lett. {\bf 87}, 087205 (2001)].
Strongly Correlated Superconductivity
M. Capone, M. Fabrizio, C. Castellani +1
High temperature superconductivity in doped Mott insulators such as the cuprates contradicts the conventional wisdom that electron repulsion is detrimental to superconductivity. Be…
Coulomb couplings in positively charged fullerene
Martin Lueders, Andrea Bordoni, Nicola Manini +3
We compute, based on density-functional electronic-structure calculations, the Coulomb couplings in the h_u highest occupied orbital of molecular C60. We obtain a multiplet-average…
First--principles calculation of the plasmon resonance and of the reflectance spectrum of Silver in the GW approximation
Andrea Marini, Rodolfo Del Sole, Giovanni Onida
We show that the position and width of the plasmon resonance in Silver are correctly predicted by ab--initio calculations including self--energy effects within the GW approximation…
Microscopic theory of vibronic dynamics in linear polyenes
L. Arrachea, A. A. Aligia, G. E. Santoro
We propose a novel approach to calculate dynamical processes at ultrafast time scale in molecules in which vibrational and electronic motions are strongly mixed. The relevant elect…
Triple-q octupolar ordering in NpO_2
J. A. Paixao, C. Detlefs, M. J. Longfield +5
We report the results of resonant X-ray scattering experiments performed at the Np M_4,5 edges in NpO_2. Below T_0 = 25 K, the development of long-range order of Np electric quadru…
Antiferromagnetism in the Exact Ground State of the Half Filled Hubbard Model on the Complete-Bipartite Graph
Gianluca Stefanucci, Michele Cini
As a prototype model of antiferromagnetism, we propose a repulsive Hubbard Hamiltonian defined on a graph with and bonds…
The infinite-range quantum random Heisenberg magnet
L. Arrachea, M. J. Rozenberg
We study with exact diagonalization techniques the Heisenberg model for a system of SU(2) spins with S=1/2 and random infinite-range exchange interactions. We calculate the critica…
Antiferromagnetism in the Exact Ground State of the Half Filled Hubbard Model on the Complete-Bipartite Graph
Gianluca Stefanucci, Michele Cini
As a prototype model of antiferromagnetism, we propose a repulsive Hubbard Hamiltonian defined on a graph with and bonds…
Low temperature transport through a quantum dot: finite-U results and scaling behavior
D. Gerace, E. Pavarini, L. C. Andreani
We calculate the conductance through a quantum dot weakly coupled to metallic leads, modeled by the spin-1/2 Anderson model with finite Coulomb repulsion . We adopt the non-cros…
Excitonic condensation in a symmetric electron-hole bilayer
S. De Palo F. Rapisarda Gaetano Senatore
Using Diffusion Monte Carlo simulations we have investigated the ground state of a symmetric electron-hole bilayer and determined its phase diagram at T=0. We find clear evidence o…
Effective hamiltonian approach for strongly correlated lattice models
Sandro Sorella
We review a recent approach for the simulation of many-body interacting systems based on an efficient generalization of the Lanczos method for Quantum Monte Carlo simulations. This…
Magnetic and lattice polaron in Holstein-t-J model
E. Cappelluti, S. Ciuchi
We investigate the interplay between the formation of lattice and magnetic polaron in the case of a single hole in the antiferromagnetic background. We present an exact analytical…
Sensitivity of the Mott Transition to Non-cubic Splitting of the Orbital Degeneracy: Application to NH3 K3C60
Nicola Manini, Giuseppe E. Santoro, Andrea Dal Corso +1
Within dynamical mean-field theory, we study the metal-insulator transition of a twofold orbitally degenerate Hubbard model as a function of a splitting Δof the degeneracy. The pha…