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
21 papers · 2 filters
Superconducting transition temperatures and coherence length in non s-wave pairing materials correlated with spin-fluctuation mediated interaction
G. G. N. Angilella, N. H. March, R. Pucci
Following earlier work on electron or hole liquids flowing through assemblies with magnetic fluctuations, we have recently exposed a marked correlation of the superconducting tempe…
Tc for non s-wave pairing superconductors correlated with coherence length and effective mass
G. G. N. Angilella, N. H. March, R. Pucci
For unconventional heavy Fermion superconductors, typified by UBe_13, the superconducting transition temperatures Tc are shown to correlate with a characteristic energy hbar^2 /(m*…
Doping-driven transition to a time-reversal breaking state in the phase diagram of the cuprates
G. Sangiovanni, M. Capone, S. Caprara +3
Motivated by recent tunnelling and Andreev-reflection experiments, we study the conditions for a quantum transition within the superconducting phase of the cuprates,in which a bulk…
Nonadiabatic Superconductivity and Vertex Corrections in Uncorrelated Systems
P. Paci, E. Cappelluti, C. Grimaldi +1
We investigate the issue of the nonadiabatic superconductivity in uncorrelated systems. A local approximation is employed coherently with the weak dependence on the involved moment…
Single-particle spectra near a stripe instability
S. Caprara, C. Di Castro, M. Grilli
We analyze the single-particle spectra of a bi-layered electron system near a stripe instability and compare the results with ARPES experiments on the Bi2212 cuprate superconductor…
Strong correlation, electron-phonon interaction and critical fluctuations: Isotope effect, pseudogap formation, and phase diagram of the cuprates
C. Di Castro, M. Grilli, S. Caprara
Within the Hubbard-Holstein model with long-range Coulomb forces, we revisit the charge-ordering scenario for the superconducting cuprates and account for the presence or the absen…
Coherence length in superconductors from weak to strong coupling
L. Benfatto, A. Toschi, S. Caprara +1
We study the evolution of the superconducting coherence length from weak to strong coupling, both within a s-wave and a d-wave lattice model. We show that the identification…
Josephson effect and tunneling spectroscopy in Nb/Al2O3/Al/MgB2 thin films junctions
G. Carapella, N. Martucciello, G. Costabile +3
We report the demonstration of dc and ac Josephson effects as well as tunneling spectroscopy measurements on Nb/Al2O3/Al/MgB2 thin films heterostructures. Data on dc Josephson effe…
Barkhausen-like conductance noise in polycrystalline high Tc superconductors immersed in a slowly varying magnetic field
A. Masoero, P. Mazzetti, I. Puica +2
Analysis of the resistive transition of a polycristalline YBCO specimen produced by an a.c. magnetic field, reveals the presence of a large conductance noise signal which is repeti…
Growth of c-oriented MgB2 thin films by Pulsed Laser Deposition: structural characterization and electronic anisotropy
C. Ferdeghini, V. Ferrando, G. Grassano +9
MgB2 thin films were deposited using Pulsed Laser Deposition (PLD) and ex-situ annealing in Mg atmosphere. The films presented critical temperatures up to 36K and turned out to be…
Electron transport properties of MgB2 in the normal state
M. Putti, E. Galleani d'Agliano, D. Marrè +7
We have measured the resistivity and the Seebeck coefficient of a MgB2 sintered sample. The temperature dependence of resistivity is fitted well by a generalized Bloch-Gruneisen eq…
Electronic and structural properties of superconducting MgB, CaSi and related compounds
G. Satta, G. Profeta, F. Bernardini +2
We report a detailed study of the electronic and structural properties of the 39K superconductor \mgbtwo and of several related systems of the same family, namely \mgalbtwo, \bebtw…
Magnetic characterization of sintered MgB2 samples: effect of the substitution or doping with Li, Al and Si
M. R. Cimberle, M. Novak, P. Manfrinetti +1
Powdered and sintered MgB2 samples have been characterized through magnetic measurements performed from T = 5 K up to few degrees above the transition temperature of about 39 K. We…
Integrable models for confined fermions: applications to metallic grains
Luigi Amico, Antonio Di Lorenzo, Andreas Osterloh
We study integrable models for electrons in metals when the single particle spectrum is discrete. The electron-electron interactions are BCS-like pairing, Coulomb repulsion, and sp…
Exact correlation functions of the BCS model in the canonical ensemble
Luigi Amico, Andreas Osterloh
We evaluate correlation functions of the BCS model for finite number of particles. The integrability of the Hamiltonian relates it with the Gaudin algebra . Theref…
Nonadiabatic Pauli susceptibility in fullerene compounds
E. Cappelluti, C. Grimaldi, L. Pietronero
Pauli paramagnetic susceptibility is unaffected by the electron-phonon interaction in the Migdal-Eliashberg context. Fullerene compounds however do not fulfill the adiabatic as…
Phase fluctuations in superconductors: from Galilean invariant to quantum XY models
L. Benfatto, A. Toschi, S. Caprara +1
We analyze the corrections to the superfluid density due to phase fluctuations within both a continuum and a lattice model for - and d-wave superconductors. We expand the phase-…
In-situ Magnesium Diboride Superconducting Thin Films grown by Pulsed Laser Deposition
G. Grassano, W. Ramadan, V. Ferrando +9
Superconducting thin films of MgB2 were deposited by Pulsed Laser Deposition on magnesium oxide and sapphire substrates. Samples grown at 450C in an argon buffer pressure of about…
Coherent oscillations in a Cooper-pair box
Mahn-Soo Choi, Rosario Fazio, Jens Siewert +1
This paper is devoted to an analysis of the experiment by Nakamura {\it et al.} (Nature {\bf 398}, 786 (1999)) on the quantum state control in Josephson junctions devices. By consi…
Reflectionless tunneling in planar Nb/GaAs hybrid junctions
Francesco Giazotto, Marco Cecchini, Pasqualantonio Pingue +5
Reflectionless-tunneling was observed in Nb/GaAs superconductor/semiconductor junctions fabricated through a two-step procedure. First, periodic -doped layers were grown by mole…
Integrable model for interacting electrons in metallic grains
Luigi Amico, Antonio Di Lorenzo, Andreas Osterloh
We find an integrable generalization of the BCS model with non-uniform Coulomb and pairing interaction. The Hamiltonian is integrable by construction since it is a functional of co…