821 citations · 2k across the 36 of their papers we have counts for
21 papers · 1 filter
Electrodynamic properties of an artificial heterostructured superconducting cuprate
A. Perucchi, P. Di Pietro, S. Lupi +6
We perform infrared conductivity measurements on a series of CaCuO/SrTiO heterostructures made by the insulating cuprate CaCuO (CCO) and the insulating perovkite SrTiO$…
An optically stimulated superconducting-like phase in K3C60 far above equilibrium Tc
M. Mitrano, A. Cantaluppi, D. Nicoletti +10
The control of non-equilibrium phenomena in complex solids is an important research frontier, encompassing new effects like light induced superconductivity. Here, we show that cohe…
Two-band conductivity of a FeSeTe film by reflectance measurements in the terahertz and infrared range
A. Perucchi, B. Joseph, S. Caramazza +7
We report an infrared spectroscopy study of a 200 nm thick FeSeTe film grown on LaAlO with T=13.7 K. We analyze the 20 K normal state absolute reflectance R…
Electrodynamics of superconducting pnictide superlattices
A. Perucchi, F. Capitani, P. Di Pietro +8
It has been recently reported (S. Lee et al., Nature Materials 12, 392, 2013) that superlattices where layers of the 8% Co-doped BaFe2As2 superconducting pnictide are intercalated…
Reproduction of Experimental Gap Structure in LiFeAs based on the Orbital-Spin Fluctuation Theory: -wave, -wave, and hole--wave states
Tetsuro Saito, Seiichiro Onari, Youichi Yamakawa +3
The absence of nesting between electron and hole-pockets in LiFeAs with K attracts great attention, as an important hint to understand the pairing mechanism of Fe-based s…
A combined experimental and computational study of the pressure dependence of the vibrational spectrum of solid picene C_22H_14
F. Capitani, M. Hoeppner, B. Joseph +9
We present high-quality optical data and density functional perturbation theory calculations for the vibrational spectrum of solid picene (CH) under pressure up to 8…
An extended infrared study of the (p,T) phase diagram of the p-doped Cu-O plane
D. Nicoletti, P. Di Pietro, O. Limaj +5
The ab-plane optical conductivity of eleven single crystals, belonging to the families Sr2-xCuO2Cl2, Y1-xCaxBa2Cu3O6, Bi2Sr2-xLaxCuO6, and Bi2Sr2CaCu2O8 has been measured with hole…
High-temperature optical spectral weight and Fermi liquid renormalization in Bi-based cuprates
D. Nicoletti, O. Limaj, P. Calvani +8
The optical conductivity and the spectral weight W(T) of two superconducting cuprates at optimum doping, Bi2Sr2-xLaxCuO6 and Bi2Sr2CaCu2O8, have been first measured up to 500 K. Ab…
Multi-gap superconductivity in a BaFe1.84Co0.16As2 film from optical measurements at terahertz frequencies
A. Perucchi, L. Baldassarre, C. Marini +10
We measured the THz reflectance properties of a high quality epitaxial thin film of the Fe-based superconductor BaFeCoAs with T=22.5 K. The film was grown…
Multi-band conductivity and multi-gap superconductivity in V3Si from optical measurements on films at terahertz frequencies
A. Perucchi, D. Nicoletti, M. Ortolani +13
The possibility of multi-band conductivity and multi-gap superconductivity is explored in oriented V3Si thin films by means of reflectance and transmittance measurements at teraher…
The optical phonon spectrum of SmFeAsO
C. Marini, C. Mirri, G. Profeta +12
We measured the Raman and the Infrared phonon spectrum of SmFeAsO polycrystalline samples. We also performed Density Functional Theory calculations within the pseudopotential appro…
Transport and infrared properties of SmFeAs(O1-xFx): from SDW to superconducting ordering
M. Tropeano, C. Fanciulli, C. Ferdeghini +12
We report measurements of resistivity, magnetoresistivity, Hall effect, Seebeck coefficient, infrared reflectivity of undoped SmFeAsO and lightly doped SmFeAs(O0.93F0.07) oxypnicti…
Frequency-dependent Thermal Response of the Charge System and Restricted Sum Rules in La(2-x)Sr(x)CuO(4)
M. Ortolani, P. Calvani, S. Lupi
By using new and previous measurements of the -plane conductivity of LaSrCuO (LSCO) it is shown that the spectral weight $W = \int_0^Ω{σ_1^{a…
Lucarelli et al. reply to Tajima et al. (cond-mat 0303493)
A. Lucarelli, S. Lupi, M. Ortolani +3
In their Comment to a recent paper of ours [Lucarelli et al., PRL 92, 037002 (2003)], Tajima et al. (cond-mat 0303493) argue that the samples of La(2-x)Sr(x)CuO(4) where we find fa…
Raman Scattering versus Infrared Conductivity: Evidence for one-dimensional Conduction in La_{2-x}Sr_{x}CuO_{4}
F. Venturini, Q. -M. Zhang, R. Hackl +6
Raman and Infrared (IR) spectra of an underdoped La_{1.90}Sr_{0.10}CuO_{4} single crystal have been measured as a function of temperature. Both techniques provide unconventional lo…
Infrared signatures of charge stripes in La(2-x)Sr(x)CuO(4)
A. Lucarelli, S. Lupi, M. Ortolani +9
The in-plane optical conductivity of seven La(2-x)Sr(x)CuO(4) single crystals with x between 0 and 0.15 has been studied from 30 to 295 K. All doped samples exhibit strong peaks in…
Optical conductivity of the nonsuperconducting cuprate La(8-x)Sr(x)Cu(8)O(20)
A. Lucarelli, S. Lupi, P. Calvani +7
La(8-x)Sr(x)Cu(8)O(20) is a non-superconducting cuprate, which exhibits a doubling of the elementary cell along the c axis. Its optical conductivity sigma (omega) has been first me…
Evolution of a polaron band through the phase diagram of Nd[2-x]Ce[x]CuO[4-y]
S. Lupi, P. Maselli, M. Capizzi +3
The evolution with doping and temperature of the polaronic absorption in a family of high-T superconductors is first followed here across the whole phase diagram. The polaron b…
Fano effect in the plane of NdCeCuO: evidence of phonon interaction with a polaronic background
S. Lupi, M. Capizzi, P. Calvani +4
Reflectance measurements in properly selected samples of NdCeCuO with different carrier concentrations provide a firm evidence of Fano antiresonances for…
Optical conductivity of CuO_2 infinite-layer films
P. Dore, P. Calvani, G. De Marzi +5
The infrared conductivity of CaCuO_2, SrCuO_{2-y}, and Sr_{0.85}Nd_{0.15}CuO_2 infinite-layer films is obtained from reflectivity measurements by taking into account the substrate…
Small and large polarons in nickelates, manganites, and cuprates
P. Calvani, P. Dore, S. Lupi +6
By comparing the optical conductivities of La_{1.67}Sr_{0.33}NiO_{4} (LSNO), Sr_{1.5}La_{0.5}MnO_4 (SLMO), Nd_2CuO_{4-y} (NCO), and Nd_{1.96}Ce_{0.04}CuO_{4} (NCCO), we have identi…