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
16 papers · 2 filters
Quantum Effects and Broken Symmetries in Frustrated Antiferromagnets
Luca Capriotti
We investigate the interplay between frustration and zero-point quantum fluctuations in the ground state of the triangular and Heisenberg antiferromagnets, using finite…
Quantum Phase Transition in Coupled Spin Ladders
Luca Capriotti, Federico Becca
The ground state of an array of coupled, spin-half, antiferromagnetic ladders is studied using spin-wave theory, exact diagonalization (up to 36 sites) and quantum Monte Carlo tech…
Spin Coulomb drag in the two-dimensional electron liquid
Irene D'Amico, Giovanni Vignale
We calculate the spin-drag transresistivity in a two-dimensional electron gas at temperature in the random phase approximation. In the low-temperat…
Quasiparticle Electronic structure of Copper in the GW approximation
Andrea Marini, Giovanni Onida, Rodolfo Del Sole
We show that the results of photoemission and inverse photoemission experiments on bulk copper can be quantitatively described within band-structure theory, with no evidence of eff…
Superconductivity in the two-dimensional t-J model
S. Sorella, G. B. Martins, F. Becca +4
Using computational techniques, it is shown that pairing is a robust property of hole doped antiferromagnetic (AF) insulators. In one dimension (1D) and for two-leg ladder systems,…
Coordinate Representation of the One-Spinon One-Holon Wavefunction and Spinon-Holon Interaction
Bogdan A. Bernevig, Domenico Giuliano, Robert B. Laughlin
By deriving and studying the coordinate representation for the one-spinon one-holon wavefunction we show that spinons and holons in the supersymmetric model with in…
Coulomb interaction effects in spin-polarized transport
Irene D'Amico, Giovanni Vignale
We study the effect of the electron-electron interaction on the transport of spin polarized currents in metals and doped semiconductors in the diffusive regime. In addition to well…
Stripes and spin-incommensurabilities are favored by lattice anisotropies
Federico Becca, Luca Capriotti, Sandro Sorella
Structural distortions in cuprate materials give a natural origin for anisotropies in electron properties. We study a modified one-band t-J model in which we allow for different ho…
Antiferromagnetic integer-spin chains in a staggered magnetic field: approaching the thermodynamic limit through the infinite-size DMRG
M. Capone, S. Caprara
We investigate the behavior of antiferromagnetic integer-spin chains in a staggered magnetic field, by means of the density-matrix renormalization group, carefully addressing the r…
Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems
Luca Capriotti, Federico Becca, Alberto Parola +1
The Resonating Valence Bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough ``quantum frustration''. This scenario, p…
Interplay between Spin and Phonon Fluctuations in the double-exchange model for the manganites
M. Capone, S. Ciuchi
We present exact solutions, mainly analytical, for the two-site double-exchange-Holstein model, that allow us to draw a complete picture of the role of both phonon and spin quantum…
Non linear sigma models and quantum spin systems
A. S. Gliozzi, A. Parola
Microscopic models of quantum antiferromagnets are investigated on the basis of a mapping onto effective low energy hamiltonians. Lattice effects are carefully taken into account a…
Glassy dynamics of the inhomogeneous metallic phase in La1-xCaxMnO3
F. Cordero, C. Castellano, R. Cantelli +1
The anelastic spectra (elastic energy loss and dynamic modulus versus temperature) of La1-xCaxMnO3 have been measured for 0.33< x < 0.5. A peak in the imaginary part of the elastic…
Nagaoka ferromagnetism in the two-dimensional infinite-U Hubbard model
Federico Becca, Sandro Sorella
We present different numerical calculations based on variational quantum Monte Carlo simulations supporting a ferromagnetic ground-state for finite and small hole densities in the…
New selection rules for resonant Raman scattering on quantum wires
E. Mariani, M. Sassetti, B. Kramer
The bosonisation technique is used to calculate the resonant Raman spectrum of a quantum wire with two electronic sub-bands occupied. Close to resonance, the cross section at frequ…
Direct Transition Between a Singlet Mott Insulator and a Superconductor
M. Capone, M. Fabrizio, E. Tosatti
We argue that a normal Fermi liquid and a singlet, spin gapped Mott insulator cannot be continuously connected, and that some intermediate phase must intrude between them. By expli…