198 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT24 papers
- Istituto Nazionale per la Fisica della MateriaIT11 papers
- National Research CouncilLK8 papers
- University of GenoaIT7 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT5 papers
- Roma Tre UniversityIT5 papers
- Centro Ricerche Enrico FermiIT4 papers
- École Polytechnique Fédérale de LausanneCH3 papers
- Scuola Normale SuperioreIT3 papers
- Universidade de São PauloBR3 papers
- University of BresciaIT3 papers
- European Laboratory for Non-Linear Spectroscopy2 papers
14 papers · 1 filter
Electron-phonon renormalization in small Fermi energy systems
E. Cappelluti, L. Pietronero
The puzzling features of recent photoemission data in cuprates have been object of several analysis in order to identity the nature of the underlying electron-boson interaction. In…
Band-filling effects on electron-phonon properties of normal and superconducting state
E. Cappelluti, S. Ciuchi, C. Grimaldi +1
We address the effect of band filling on the effective electron mass and the superconducting critical temperature in a electron-phonon system. We compare the vertex cor…
Formation and mobility of oxygen vacancies in RuSr2GdCu2O8
F. Cordero, M. Ferretti, M. R. Cimberle +1
Oxygen vacancies are introduced in the RuO2 and possibly CuO2 planes of RuSr2GdCu2O8 by annealing in vacuum above 600 K. The diffusive jumps of the O vacancies are accompanied by a…
Anelastic relaxation process of polaronic origin in La{2-x}Sr{x}CuO{4}: interaction between the charge stripes and pinning centers
F. Cordero, A. Paolone, R. Cantelli +1
The evolution of an anelastic relaxation process occurring around 80 K in La{2-x}Sr{x}CuO{4} at a measuring frequency of ~1 kHz has been followed from x = 0.0075 to the overdoped r…
Anelastic spectroscopy study of the spin-glass and cluster spin-glass phases of LaSrCuO
A. Paolone, F. Cordero, R. Cantelli +1
The anelastic spectra of LaSrCuO have been measured at liquid He temperatures slightly below and above the concentration which is considere…
Acoustic measurement of the low-energy excitations in Nd2-xCexCuO4
F. Cordero, C. R. Grandini, M. Ferretti
The complex dynamic Young's modulus of ceramic Nd2-xCexCuO4 with x = 0, 0.05 and 0.20 has been measured from 1.5 to 100 K at frequencies of 1-10 kHz. In the undoped sample the modu…
Small Fermi energy and phonon anharmonicity in MgB_2 and related compounds
Lilia Boeri, Giovanni B. Bachelet, Emmanuele Cappelluti +1
The remarkable anharmonicity of the E_{2g} phonon in MgB_2 has been suggested in literature to play a primary role in its superconducting pairing. We investigate, by means of LDA c…
A search for incipient lattice instabilities in MgB by anelastic spectroscopy
F. Cordero, R. Cantelli, G. Giunchi +1
We measured the complex dynamic elastic modulus of MgB2 between 1.3 and 650 K at frequencies included between 5 and 70 kHz. The main purpose of this work is to search for possible…
High superconductivity in MgB by nonadiabatic pairing
E. Cappelluti, S. Ciuchi, C. Grimaldi +2
The evidence for the key role of the bands in the electronic properties of MgB points to the possibility of nonadiabatic effects in the superconductivity of these materials…
Cluster Spin Glass Distribution Functions in LaSrCuO
R. S. Markiewicz, F. Cordero, A. Paolone +1
Signatures of the cluster spin glass have been found in a variety of experiments, with an effective onset temperature that is frequency dependent. We reanalyze the experim…
Pinning of the domain walls of the cluster spin-glass phase in LTT La_{2-x}Ba_xCuO_4
F. Cordero, A. Paolone, R. Cantelli +1
We compare the low frequency (~1 kHz) anelastic spectra of La_{2-x}Sr_xCuO_4 and La_{2-x}Ba_xCuO_4 at x = 0.03 and 0.06 in the temperature region where the freezing into the cluste…
Anelastic relaxation and La NQR in LaSrCuO around the critical Sr content x=0.02
A. Campana, M. Corti, A. Rigamonti +2
Anelastic relaxation and La NQR relaxation measurements in LaSrCuO for Sr content x around 2 and 3 percent, are presented and discussed in terms of spin and…
Tunneling driven tilt modes of the O octahedra in La{2-x}Sr{x}CuO{4}: strong dependence on doping
F. Cordero, R. Cantelli, M. Ferretti
The anelastic spectrum of La{2-x}Sr{x}CuO{4} (x = 0, 0.008, 0.019, 0.032) has been measured down to 1.5 K, in order to see the effect of doping on the intrinsic lattice fluctuation…
Tilt waves dynamics of the oxygen octahedra in La2CuO4 from anelastic and 139La NQR relaxation
F. Cordero, R. Cantelli, M. Corti +2
The anharmonic vibrational dynamics in nearly stoichiometric La2CuO4+delta is studied by means of anelastic and ^{139}La NQR relaxation. In the absorption component of the elastic…