202 citations · 881 across the 21 of their papers we have counts for
21 papers
Machine-learning test of the single-ion model for excitations in cuprates
Maryia Zinouyeva, Leonardo Martinelli, Riccardo Arpaia +12
We investigate excitations in Resonant Inelastic X-ray Scattering spectra of YBaCuO and LaCuO using the local single-ion model. The data are analyzed by co…
Spin and orbital excitations in undoped infinite layers: a comparison between superconducting PrNiO2 and insulating CaCuO2
Francesco Rosa, Hoshang Sahib, Giacomo Merzoni +9
Infinite-layer nickelates are among the most promising cuprate-akin superconductors, although relevant differences from copper oxides have been reported. Here, we present momentum-…
The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
Maryia Zinouyeva, Rolf Heid, Giacomo Merzoni +16
The experimental determination of the magnitude and momentum dependence of electron-phonon coupling (EPC) is an outstanding problem in condensed matter physics. The intensity of ph…
Fractional spin excitations in the infinite-layer cuprate CaCuO
Leonardo Martinelli, Davide Betto, Kurt Kummer +6
We use resonant inelastic x-ray scattering (RIXS) to investigate the magnetic dynamics of the infinite-layer cuprate CaCuO2. We find that close to the (1/2,0) point the single magn…
Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds
Davide Betto, Roberto Fumagalli, Leonardo Martinelli +12
Thanks to high resolution and polarization analysis, resonant inelastic x-ray scattering (RIXS) magnetic spectra of La2CuO4, Sr2CuO2Cl2 and CaCuO2 reveal a rich set of properties o…
Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on NdBaCuO
Lucio Braicovich, Matteo Rossi, Roberto Fumagalli +15
The coupling between lattice vibration quanta and valence electrons can induce charge density modulations and decisively influence the transport properties of materials, e.g. leadi…
Coexistence of pressure-induced structural phases in bulk black phosphorus: a combined x-ray diffraction and Raman study up to 18 GPa
B. Joseph, S. Caramazza, F. Capitani +7
We report a study of the structural phase transitions induced by pressure in bulk black phosphorus by using both synchrotron x-ray diffraction for pressures up to 12.2 GPa and Rama…
Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
Y. Y. Peng, G. Dellea, M. Minola +14
In high Tc superconductors the magnetic and electronic properties are determined by the probability that valence electrons virtually jump from site to site in the CuO2 planes, a me…
Raman spectroscopy study of the interface structure in (CaCuO2)n/(SrTiO3)m superlattices
D. Di Castro, S. Caramazza, D. Innocenti +4
Raman spectra of CaCuO2/SrTiO3 superlattices show clear spectroscopic marker of two structures formed in CaCuO2 at the interface with SrTiO3. For non-superconducting superlattices,…
Interface reconstruction in superconducting CaCuO2/SrTiO3 superlattices: A hard x-ray photoelectron spectroscopy study
Carmela Aruta, Christoph Schlueter, Tien-Lin Lee +5
Here we report about the interface reconstruction in the recently discovered superconducting artificial superlattices based on insulating CaCuO2 and SrTiO3 blocks. Hard x-ray photo…
Charge localization at the interface between La1-xSrxMnO3 and the infinite layers cuprate CaCuO2
Nan Yang, D. Di Castro, C. Aruta +8
(CaCuO2)m/(La0.7Sr0.3MnO3)n superlattices, consisting of the infinite layers cuprate CaCuO2 and the optimally doped manganite La1-xSrxMnO3, were grown by pulsed laser deposition. T…
High Tc superconductivity in superlattices of insulating oxides
D. Di Castro, M. Salvato, A. Tebano +13
We report the occurrence of superconductivity, with maximum Tc = 40 K, in superlattices (SLs) based on two insulating oxides, namely CaCuO2 and SrTiO3. In these (CaCuO2)n/(SrTiO3)m…
Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors
D. Di Castro, R. Khasanov, A. Shengelaya +5
The effect of pressure on the magnetic penetration depth was tested in the hole-doped superconductor YBa2Cu3O(7-d) and in the electron-doped one Sr0.9La0.1CuO2 by means of magn…
Evidence for coupling between collective state and phonons in two-dimensional charge-density-wave systems
M. Lavagnini, M. Baldini, A. Sacchetti +8
We report on a Raman scattering investigation of the charge-density-wave (CDW), quasi two-dimensional rare-earth tri-tellurides Te (= La, Ce, Pr, Nd, Sm, Gd and Dy) at am…
Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC6
D. Di Castro, A. Kanigel, A. Maisuradze +9
We report temperature- and magnetic field-dependent bulk muon spin rotation measurements in a c-axis oriented superconductor CaC6 in the mixed state. Using both a simple second mom…
Evidence of a pressure-induced metallization process in monoclinic VO
E. Arcangeletti, L. Baldassarre, D. Di Castro +5
Raman and combined trasmission and reflectivity mid infrared measurements have been carried out on monoclinic VO at room temperature over the 0-19 GPa and 0-14 GPa pressure ran…
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…
Role of charge doping and lattice distortions in codoped Mg_{1-x}(AlLi)_{x}B_2 compounds
M. Monni, C. Ferdeghini, P. Manfrinetti +10
We prepared a series of Mg_{1-x}(AlLi)_{x}B_2 samples with 0≤x≤0.45 in order to compensate with Li the electron doping induced by Al. Structural characterization by mea…
Effect of Al doping on the optical phonon spectrum in Mg(1-x)Al(x)B(2)
P. Postorino, A. Congeduti, P. Dore +5
Raman and infrared absorption spectra of Mg(1-x)Al(x)B(2) have been collected for 0<x<0.5 in the spectral range of optical phonons. The x-dependence of the peak frequency, the widt…
A Superconductor Made by a Metal Heterostructure at the Atomic Limit Tuned at the "Shape Resonance": MgB2
A. Bianconi, D. Di Castro, S. Agrestini +5
We have studied the variation of Tc with charge density and lattice parameters in Mg1-xAlxB2 superconducting samples at low Al doping x<8%. We show that high Tc occurs where the ch…
High Tc superconductivity at a critical strain and charge density in diborides
A. Bianconi, N. L. Saini, D. Di Castro +5
We report variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K…