Publications (18)
Sc substitution for Mg in MgB2: effects on Tc and Kohn anomaly
S. Agrestini, C. Metallo, M. Filippi +9
Here we report synthesis and characterization of Mg_{1-x}Sc_{x}B_{2} (0.12<x<0.27) system, with critical temperature in the range of 30>T_{c}>6 K. We find that the Sc doping moves…
Coexistence of different electronic phases in the K0.8Fe1.6Se2 superconductor: a bulk-sensitive hard x-rays spectroscopy study
L. Simonelli, N. L. Saini, M. Moretti Sala +5
We have studied electronic and magnetic properties of the K0.8Fe1.6Se2 superconductor by x-ray absorption and emission spectroscopy. Detailed temperature dependent measurements alo…
Electronic Structure of CeFeAsO1-xFx (x=0, 0.11/x=0.12) compounds
F. Bondino, E. Magnano, C. H. Booth +14
We report an extensive study on the intrinsic bulk electronic structure of the high-temperature superconductor CeFeAsO0.89F0.11 and its parent compound CeFeAsO by soft and hard x-r…
Temperature-dependent local structure of superconducting BaPdAs and SrPdAs
K. Terashima, E. Paris, L. Simonelli +12
The local structures of 122-type paradium arsenides, namely BaPdAs and SrPdAs, are examined by As K-edge extended x-ray absorption fine structure measurements to fi…
5d-5f Electric-multipole Transitions in Uranium Dioxide Probed by Non-resonant Inelastic X-ray Scattering
R. Caciuffo, G. van der Laan, L. Simonelli +4
Non-resonant inelastic x ray scattering (NIXS) experiments have been performed to probe the 5d-5f electronic transitions at the uranium O(4,5) absorption edges in uranium dioxide.…
A study of electronic structure of FeSeTe chalcogenides by Fe and Se K-edge x-ray absorption near edge structure measurements
B. Joseph, A. Iadecola, L. Simonelli +4
Fe K-edge and Se K-edge x-ray absorption near edge structure (XANES) measurements are used to study FeSeTe electronic structure of chalcogenides. An intense Fe K-edge…
Low-cost vacuum compatible liquid cell for hard X-ray absorption spectroscopy
C. Marini, R. Boada, J. Prieto Burgos +3
We present the design, fabrication, and commissioning of a new liquid cell for X-ray absorption spectroscopy, that allows measurement in both transmission and fluorescence modes. T…
Evolution of electronic and magnetic properties in a series of iridate double perovskites PrSrMgIrO ( = 0, 0.5, 1.0)
Abhisek Bandyopadhyay, I. Carlomagno, L. Simonelli +4
Spin-orbit coupling (SOC) plays a crucial role in magnetic and electronic properties of 5 iridates. In this paper we have experimentally investigated the structural and physical…
Evidence of quantum dimer excitations in SrIrO
M. Moretti Sala, V. Schnells, S. Boseggia +12
The magnetic excitation spectrum in the bilayer iridate SrIrO has been investigated using high-resolution resonant inelastic x-ray scattering (RIXS) performed at the ir…
Effect of Ru susbstitution on atomic displacements in the layered SmFe_{1-x}Ru_xAsO_{0.85}F_{0.15} superconductor
A. Iadecola, B. Joseph, L. Simonelli +6
The effect of Ru substitution on the local structure of layered SmFeRuAsOF superconductor has been studied by As - and Sm - edges x-ray-absor…
Temperature dependence of iron local magnetic moment in phase-separated superconducting chalcogenide
L. Simonelli, T. Mizokawa, M. Moretti Sala +6
We have studied local magnetic moment and electronic phase separation in superconducting KFeSe by x-ray emission and absorption spectroscopy. Detailed temperature…
Itinerant electrons, local moments, and magnetic correlations in pnictides high temperature superconductors
P. Vilmercati, A. Fedorov, F. Bondino +11
A direct and element-specific measurement of the local Fe spin moment has been provided by analyzing the Fe 3s core level photoemission spectra in the parent and optimally doped Ce…
Local structure of REFeAsO (RE=La, Pr, Nd, Sm) oxypnictides studied by Fe K-edge EXAFS
A. Iadecola, S. Agrestini, M. Filippi +5
Local structure of REOFeAs (RE=La, Pr, Nd, Sm) system has been studied as a function of chemical pressure varied due to different rare-earth size. Fe K-edge extended X-ray absorpti…
Bimagnon studies in cuprates with Resonant Inelastic X-ray Scattering at the O K edge. I - An assessment on La2CuO4 and a comparison with the excitation at Cu L3 and Cu K edges
V. Bisogni, L. Simonelli, L. J. P. Ament +8
We assess the capabilities of magnetic Resonant Inelastic X-ray Scattering (RIXS) at the O edge in undoped cuprates by taking La_{2}CuO_{4} as a benchmark case, based on a seri…
Isotope effect on the E2g phonon and mesoscopic phase separation near the electronic topological transition in Mg1-xAlxB2
L. Simonelli, V. Palmisano, M. Fratini +5
We report the boron isotope effect on the E2g phonon mode by micro-Raman spectroscopy on the ternary Mg1-xAlxB2 system, synthesized with pure isotopes 10B and 11B. The isotope coef…
Orbital occupancies and the putative jeff = 1/2 groundstate in Ba2IrO4: a combined oxygen K edge XAS and RIXS study
M. Moretti Sala, M. Rossi, S. Boseggia +9
The nature of the electronic groundstate of Ba2IrO4 has been addressed using soft X-ray absorption and inelastic scattering techniques in the vicinity of the oxygen K edge. From th…
Evidence of local structural inhomogeneity in FeSe(1-x)Te(x) from extended x-ray absorption fine structure
B. Joseph, A. Iadecola, A. Puri +4
Local structure of FeSe(1-x)Te(x) has been studied by extended x-ray absorption fine-structure (EXAFS) measurements as a function of temperature. Combination of Se and Fe K edge EX…
Determination of the local structure of SrMIrO (M = K, La) as a function of doping and temperature
K. Terashima, E. Paris, E. Salas-Colera +11
The local structure of correlated spin-orbit insulator SrMIrO (M = K, La) has been investigated by Ir L-edge extended x-ray absorption fine structure measuremen…