202 citations · 881 across the 21 of their papers we have counts for
14 papers · 1 filter
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-…
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…
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,…
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…
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…
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…