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
17 papers · 2 filters
Determination of the (3x3)-Sn/Ge(111) structure by photoelectron diffraction
L. Petaccia, L. Floreano, M. Benes +6
At a coverage of about 1/3 monolayer, Sn deposited on Ge(111) below 550 forms a metastable (sqrt3 x sqrt3)R30 phase. This phase continuously and reversibly transforms into a (3x3)…
Auger spectroscopy of strongly correlated systems: present status and future trends
Claudio Verdozzi, Michele Cini, Andrea Marini
We review the Cini-Sawatzky approach to the line shape analysis of Auger CVV transitions, in its basic and original formulation. Then, several extensions of the theory are reviewed…
Coordinate Representation of the Two-Spinon wavefunction and Spinon Interaction
B. A. Bernevig, D. Giuliano, R. B. Laughlin
By deriving and studying the coordinate representation for the two-spinon wavefunction, we show that spinon excitations in the Haldane-Shastry model interact. The interaction is gi…
Electron-phonon interaction on bundled structures: static and transport properties
Ilaria Meccoli, Massimo Capone
We study the small-polaron problem of a single electron interacting with the lattice for the Holstein model in the adiabatic limit on a comb lattice, when the electron-phonon inter…
Spatially homogeneous ground state of the two-dimensional Hubbard model
F. Becca, M. Capone, S. Sorella
We investigate the stability with respect to phase separation or charge density-wave formation of the two-dimensional Hubbard model for various values of the local Coulomb repulsio…
Exact bounds on the ground-state energy of the infinite-U Hubbard model
Federico Becca, Luca Capriotti, Sandro Sorella +1
We give upper and lower bounds for the ground-state energy of the infinite-U Hubbard model. In two dimensions, using these bounds we are able to rule out the possibility of phase s…
Generalized Lanczos Algorithm for Variational Quantum Monte Carlo
S. Sorella
We show that the standard Lanczos algorithm can be efficiently implemented statistically and self consistently improved, using the stochastic reconfigurat ion method, which has bee…
Optical absorption from a non degenerate polaron gas
S. Fratini F. de Pasquale S. Ciuchi
We apply the Dynamical Mean Field Theory to calculate the low-density limit of the optical conductivity in the Holstein model. This non perturbative treatment allows to span contin…
On-site magnetization in open antiferromagnetic chains: a classical analysis versus NMR experiments in a spin-1 compound
S. Botti, A. Rosso, R. Santachiara +1
The response of an open spin chain with isotropic antiferromagnetic interactions to a uniform magnetic field is studied by classical Monte Carlo simulations. It is observed how the…
Fermionic long range correlations realized by particles obeying deformed statistics
Andreas Osterloh, Luigi Amico, Ulrich Eckern
Deformed exchange statistics is realized in terms of electronic operators. This is employed to rewrite Hubbard type lattice models for particles obeying deformed statistics (we ref…
The Mott Metal-Insulator transition in the half-filled Hubbard model on the Triangular Lattice
Massimo Capone, Luca Capriotti, Federico Becca +1
We investigate the metal-insulator transition in the half-filled Hubbard model on a two-dimensional triangular lattice using both the Kotliar-Ruckenstein slave-boson technique, and…
Stability of d-wave superconductivity in the t-J model
Federico Becca, Luca Capriotti, Sandro Sorella
We use a recently developed technique, which allows to perform few Lanczos steps on a given wavefunction even for large system sizes, to investigate the model in the physic…
Spectroscopic fingerprints of a surface Mott-Hubbard insulator: the case of SiC(0001)
G. Santoro, S. Scandolo, E. Tosatti
We discuss the spectroscopic fingerprints that a surface Mott-Hubbard insulator should show at the intra-atomic level. The test case considered is that of the Si-terminated SiC(000…
The phase diagram of quantum systems: Heisenberg antiferromagnets
Pietro Gianinetti, Alberto Parola
A novel approach for studying phase transitions in systems with quantum degrees of freedom is discussed. Starting from the microscopic hamiltonian of a quantum model, we first deri…
Tomonaga-Luttinger features in the resonant Raman spectra of quantum wires
B. Kramer, M. Sassetti
The differential cross section for resonant Raman scattering from the collective modes in a one dimensional system of interacting electrons is calculated non-perturbatively using t…
A microscopic approach to phase transitions in quantum systems
Pietro Gianinetti, Alberto Parola
We present a new theoretical approach for the study of the phase diagram of interacting quantum particles: bosons, fermions or spins. In the neighborhood of a phase transition, the…
Observation of the cluster spin-glass phase in La_{2-x}Sr_{x}CuO_{4} by anelastic spectroscopy
F. Cordero, R. Cantelli, A. Paolone +1
An increase of the acoustic absorption is found in La_{2-x}Sr_{x}CuO_{4} (x = 0.019, 0.03 and 0.06) close to the temperatures at which freezing of the spin fluctuations in antiferr…