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
Near-field light emission from nano- and micrometric complex structures
M. Pieruccini, S. Savasta, R. Girlanda +2
We propose a general theoretical scheme for the investigation of light emitted from nano- and micrometric structures of arbitrary shape and composition. More specifically, the prop…
Anharmonic Self-Energy of Phonons: Ab Initio Calculations and Neutron Spin Echo Measurements
A. Debernardi, F. de Geuser, J. Kulda +2
We have calculated (ab initio) and measured (by spin-echo techniques) the anharmonic self-energy of phonons at the X-point of the Brillouin zone for isotopically pure germanium. Th…
Quantum size effects in the low temperature layer-by-layer growth of Pb on Ge(001)
L. Floreano, D. Cvetko, F. Bruno +5
The electronic properties of thin metallic films deviate from the corresponding bulk ones when the film thickness is comparable with the wavelength of the electrons at the Fermi le…
Surface magnetic canting in a ferromagnet
P. Betti, M. G. Pini, A. Rettori
The surface magnetic canting (SMC) of a semi-infinite film with ferromagnetic exchange interaction and competing bulk and surface anisotropies is investigated via a nonlinear mappi…
Irreversible nucleation in molecular beam epitaxy: From theory to experiments
Paolo Politi, Claudio Castellano
Recently, the nucleation rate on top of a terrace during the irreversible growth of a crystal surface by MBE has been determined exactly. In this paper we go beyond the standard mo…
Accurate first principles detailed balance determination of Auger recombination and impact ionization rates in semiconductors
S. Picozzi, R. Asahi, C. B. Geller +1
The technologically important problem of predicting Auger recombination lifetimes in semiconductors is addressed by means of a fully first--principles formalism. The calculations e…
Dipolar interaction between two-dimensional magnetic particles
Paolo Politi, Maria Gloria Pini
We determine the effective dipolar interaction between single domain two-dimensional ferromagnetic particles (islands or dots), taking into account their finite size. The first cor…
Disproportionation Phenomena on Free and Strained Sn/Ge(111) and Sn/Si(111) Surfaces
G. Ballabio, G. Profeta, S. de Gironcoli +3
Distortions of the Sn/Ge(111) and Sn/Si(111) surfaces are shown to reflect a disproportionation of an integer pseudocharge, , related to the surface band oc…
Exciton-exciton interaction engineering in coupled GaN quantum dots
Sergio De Rinaldis, Irene D'Amico, Fausto Rossi
We present a fully three-dimensional study of the multiexciton optical response of vertically coupled GaN-based quantum dots via a direct-diagonalization approach. The proposed ana…
Symmetry breaking and restoring under high pressure: the amazing behaviour of the "simple" alkali metals
G. G. N. Angilella, F. Siringo, R. Pucci
We argue that an ionic lattice surrounded by a Fermi liquid changes phase several times under pressure, oscillating between the symmetric phase and a low-symmetry dimerized structu…
Spectral Properties of the Su-Schrieffer-Heeger Model
Marco Zoli
We present a study of the one dimensional Su-Schrieffer-Heeger model Hamiltonian by a diagrammatic perturbative method in the weak electron-phonon coupling regime. Exact computatio…
Ferroelectricity and isotope effects in hydrogen-bonded KDP crystals
S. Koval, J. Kohanoff, R. L. Migoni +1
Based on an accurate first principles description of the energetics in H-bonded KDP, we conduct a first study of nuclear quantum effects and of the changes brought about by deutera…
Structural relaxation of E' gamma centers in amorphous silica
S. Agnello, R. Boscaino, G. Buscarino +2
We report experimental evidence of the existence of two variants of the E' gamma centers induced in silica by gamma rays at room temperature. The two variants are distinguishable b…
First-principles calculation of the piezoelectric tensor d of III-V nitrides
F. Bernardini, V. Fiorentini
We report direct first-principles density-functional calculations of the piezoelectric tensor $\tensor{d}$ relating polarization to applied stress for the binary compounds AlN, GaN…
A positron study of the Fermi surface of TmGa3
M. Biasini, A. Czopnik, A. Jura +2
For a single crystal of TmGa3, two-dimensional angular correlation of positron annihilation radiation spectra were measured and subjected to a deconvolution algorithm based on the…
Structural transformation induced by magnetic field and colossal magnetoresistance response above 313 K in MnAs
J. Mira, F. Rivadulla, J. Rivas +5
MnAs exhibits a first-order phase transition from a ferromagnetic, high-spin metal NiAs-type hexagonal phase to a paramagnetic, lower-spin insulator MnP-type orthorhombic phase at…