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
93 papers · 1 filter
Vortex dynamics and irreversibility line in optimally doped SmFeAsOF from ac susceptibility and magnetization measurements
G. Prando, P. Carretta, R. De Renzi +4
Ac susceptibility and static magnetization measurements were performed in the optimally doped SmFeAsOF superconductor. The field - temperature phase diagram of the…
High-energy ball milling and synthesi temperature study to improve superconducting properties of MgB2 ex-situ tapes and wires
Gennaro Romano, Maurizio Vignolo, Valeria Braccini +6
MgB2 monofilamentary nickel-sheated tapes and wires were fabricated by means of the ex-situ powder-in-tube method using either high-energy ball milled and low temperature synthesiz…
Relevant energy scale in hybrid mesoscopic Josephson junctions
Franco Carillo, Detlef Born, Vittorio Pellegrini +4
Transport properties of high quality Nb/semiconductor/Nb long Josephson junctions based on metamorphic In_0.75Ga_0.25As epitaxial layers are reported. Different junction geometries…
Low-energy signatures of charge and spin fluctuations in Raman and optical spectra of the cuprates
S. Caprara, C. Di Castro, T. Enss +1
We calculate the optical and Raman response within a phenomenological model of fermion quasiparticles coupled to nearly critical collective modes. We find that, whereas critical sc…
Resonance phenomena in asymmetric superconducting quantum interference devices
T. P. Polak, E. Sarnelli
Theory of self induced resonances in asymmetric two-junction interferometer device is presented. In real devices it is impossible to have an ideal interferometer free of imperfecti…
Competition between local and nonlocal dissipation effects in two-dimensional quantum Josephson junction arrays
T. P. Polak, T. K. Kopec
We discuss the local and nonlocal dissipation effects on the existence of the global phase coherence transitions in two dimensional Josephson-coupled junctions. The quantum phase t…
Tuning topological disorder in MgB
D. Di Castro, E. Cappelluti, M. Lavagnini +4
We carried out Raman measurements on neutron-irradiated and Al-doped MgB samples. The irradiation-induced topological disorder causes an unexpected appearance of high frequency…
Effects of neutron irradiation on polycrystalline Mg11B2
C. Tarantini, H. U. Aebersold, V. Braccini +13
We studied the influence of the disorder introduced in polycrystalline MgB2 samples by neutron irradiation. To circumvent self shielding effects due to the strong interaction betwe…
Finite-Temperature Renormalization Group Analysis of Interaction Effects in 2D Lattices of Bose-Einstein Condensates
A. Smerzi, P. Sodano, A. Trombettoni
By using a renormalization group analysis, we study the effect of interparticle interactions on the critical temperature at which the Berezinskii-Kosterlitz-Thouless (BKT) transiti…
Coherent Inverse Photoemission Spectrum for Gutzwiller Projected Superconductors
Seiji Yunoki
Rigorous relations for Gutzwiller projected BCS states are derived. The obtained results do not depend on the details of model systems, but solely on the wave functions. Based on t…
Enhanced flux pinning in neutron irradiated MgB2
I. Pallecchi, C. Tarantini, H. U. Aebersold +11
We study the effect of neutron irradiation on the critical current density Jc of isotopically pure polycrystalline Mg11B2 samples. For fluences in the range 1017-1018 cm-2, Jc is e…
Effective gap at microwave frequencies in MgB2 thin films with strong interband scattering
G. Ghigo, D. Botta, A. Chiodoni +6
The microwave properties of polycrystalline MgB2 thin films prepared by the so-called in-situ method are investigated. The characterization of the films at microwave frequencies wa…
Extended paraconductivity regime in underdoped cuprates
S. Caprara, M. Grilli, B. Leridon +1
We reconsider transport experiments in strongly anisotropic superconducting cuprates and we find that universal Aslamazov-Larkin (AL) paraconductivity in two dimensions is surprisi…
Multiband superconductors close to a 3D-2D electronic topological transition
G. G. N. Angilella, A. Bianconi, R. Pucci
Within the two-band model of superconductivity, we study the dependence of the critical temperature Tc and of the isotope exponent alpha in the proximity to an electronic topologic…
Charge-fluctuation contribution to the Raman response in superconducting cuprates
S. Caprara, C. Di Castro, M. Grilli +1
We calculate the Raman response contribution due to collective modes, finding a strong dependence on the photon polarizations and on the characteristic wavevectors of the modes. We…
Tc for heavy Fermion superconductors linked with other physical properties at zero and applied pressure
G. G. N. Angilella, N. H. March, R. Pucci
The superconducting transition temperature Tc has earlier been correlated with coherence length and effective mass for a series of heavy Fermion (HF) materials at atmospheric press…
Quasi-particle dephasing time in disordered d-wave superconductors
M. Bruno, A. Toschi, L. Dell'Anna +1
We evaluate the low-temperature cutoff for quantum interference 1/tf induced in a d-wave superconductor by the diffusion enhanced quasiparticle interactions in the presence of diso…
Clean and Dirty Superconductivity in Pure, Al doped, and Neutron Irradiated MgB2: a Far-Infrared Study
M. Ortolani, D. Di Castro, P. Postorino +4
The effects of Al substitution and neutron irradiation on the conduction regime (clean or dirty) of the - and -band of MgB have been investigated by means of far-infrar…
Upper Critical Fields up to 60T in Dirty Magnesium Diboride Thin Films
C. Ferdeghini, V. Ferrando, C. Tarantini +11
Upper critical fields of several magnesium diboride thin films were measured up to 28 T at the Grenoble High Magnetic Field Laboratory (GHMFL) in Grenoble and up to 60 T at the Lab…
W=0 pairing in Hubbard and related models of low-dimensional superconductors
Adalberto Balzarotti, Michele Cini, Enrico Perfetto +1
Lattice Hamiltonians with on-site interaction have W=0 solutions, that is, many-body {\em singlet} eigenstates without double occupation. In particular, W=0 pairs give a clue t…
Microscopic Model for a Strongly Correlated Superconducting Single-Electron-Transistor
Enrico Perfetto, Michele Cini
We model a Superconducting Single-Electron Transistor operating by repulsive interactions. The device consists of a ring of Hubbard clusters, placed between electrodes and capaciti…
Effect of nonuniform hole-content distribution within the interlayer pair-tunneling mechanism of layered HTSC
G. G. N. Angilella, R. Pucci
The interlayer pair-tunneling (ILT) mechanism for high- superconductivity is able to predict the dependence of the (optimal) critical temperature Tc on the number of layers n…
Ab-initio theory of superconductivity - II: Applications to elemental metals
M. A. L. Marques, M. Lüders, N. N. Lathiotakis +6
The density functional theory for superconductors developed in the preceding article [cond-mat/0408685] is applied to the calculation of superconducting properties of several eleme…
Ab-initio theory of superconductivity - I: Density functional formalism and approximate functionals
M. Lüders, M. A. L. Marques, N. N. Lathiotakis +6
A novel approach to the description of superconductors in thermal equilibrium is developed within a formally exact density-functional framework. The theory is formulated in terms o…