Search Results - "DAGHERO, D"

Large conductance modulation of gold thin films by huge charge injection via electrochemical gating by Daghero, D, Paolucci, F, Sola, A, Tortello, M, Ummarino, G A, Agosto, M, Gonnelli, R S, Nair, Jijeesh R, Gerbaldi, C

“…By using an electrochemical gating technique with a new combination of polymer and electrolyte, we were able to inject surface charge densities n(2D) as high…”
Get full text

Strong-coupling d-wave superconductivity in PuCoGa5 probed by point-contact spectroscopy by Daghero, D., Tortello, M., Ummarino, G.A., Griveau, J.-C., Colineau, E., Eloirdi, R., Shick, A.B., Kolorenc, J., Lichtenstein, A.I., Caciuffo, R.

“…Superconductivity is due to an attractive interaction between electrons that, below a critical temperature, drives them to form Cooper pairs and to condense…”
Get full text

Huge field-effect surface charge injection and conductance modulation in metallic thin films by electrochemical gating by Tortello, M., Sola, A., Sharda, Kanudha, Paolucci, F., Nair, J.R., Gerbaldi, C., Daghero, D., Gonnelli, R.S.

“…► Novel polymer-gating field-effect experiments allow to reach a record induced surface charge density of 4×1015charges/cm2. ► A modification of the…”
Get full text

Fermi-Surface Topological Phase Transition and Horizontal Order-Parameter Nodes in CaFe2As2 Under Pressure by Gonnelli, R. S., Daghero, D., Tortello, M., Ummarino, G. A., Bukowski, Z., Karpinski, J., Reuvekamp, P. G., Kremer, R. K., Profeta, G., Suzuki, K., Kuroki, K.

“…Iron-based compounds (IBS) display a surprising variety of superconducting properties that seems to arise from the strong sensitivity of these systems to tiny…”
Get full text

Effect of ion irradiation on surface morphology and superconductivity of BaFe 2 (As 1−x P x ) 2 films by Daghero, D., Tortello, M., Gozzelino, L., Gonnelli, R.S., Hatano, T., Kawaguchi, T., Ikuta, H.

Get full text

Single crystals of LnFeAsO1−xFx (Ln=La, Pr, Nd, Sm, Gd) and Ba1−xRbxFe2As2: Growth, structure and superconducting properties by Karpinski, J., Zhigadlo, N.D., Katrych, S., Bukowski, Z., Moll, P., Weyeneth, S., Keller, H., Puzniak, R., Tortello, M., Daghero, D., Gonnelli, R., Maggio-Aprile, I., Fasano, Y., Fischer, Ø., Rogacki, K., Batlogg, B.

Get full text

Advanced surface characterization of Ba(Fe0.92CO0.08)2As2 epitaxial thin films by DAGHERO, D, PECCHIO, P, LAVIANO, F, GONNELLI, R. S, KURTH, F, GRINENKO, V, IIDA, K

“…We report on the systematic characterization of Ba(Fe0.92Co0.08)2As2 epitaxial thin films on CaF2 substrate in view of their possible use for superconducting…”
Get full text

Resistivity in Ba(Fe1−xCox)2As2: Comparison of thin films and single crystals by Ummarino, G. A., Galasso, S., Pecchio, P., Daghero, D., Gonnelli, R. S., Kurth, F., Iida, K., Holzapfel, B.

“…The temperature dependence of the resistivity of epitaxial Ba(Fe1−xCox)2As2 thin films (with nominal doping x=0.08,0.1 and 0.15) has been analysed and compared…”
Get full text

Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy by Gonnelli, R S, Daghero, D, Delaude, D, Tortello, M, Ummarino, G A, Stepanov, V A, Kim, J S, Kremer, R K, Sanna, A, Profeta, G, Massidda, S

“…We present the first results of directional point-contact spectroscopy in high-quality CaC6 samples both along the ab plane and in the c-axis direction. The…”
Get full text

Phonon dispersion and lifetimes in MgB2 by Shukla, Abhay, Calandra, Matteo, D'Astuto, Matteo, Lazzeri, Michele, Mauri, Francesco, Bellin, Christophe, Krisch, Michael, Karpinski, J, Kazakov, S M, Jun, J, Daghero, D, Parlinski, K

“…We measure phonon dispersion and linewidth in a single crystal of MgB2 along the Gamma-A, Gamma-M, and A-L directions using inelastic x-ray scattering. We use…”
Get full text

Normal and superconducting properties of LiFeAs explained in the framework of four-band Eliashberg theory by Ummarino, G.A., Galasso, Sara, Daghero, D., Tortello, M., Gonnelli, R.S., Sanna, A.

“…•Four bands Eliashberg equations reproduce experimental data of LiFeAs.•The mechanism of superconductivity is antiferromagnetic spin fluctuation.•Estimate of…”
Get full text

Resistivity in Ba(FeCo)As: Comparison of thin films and single crystals by Ummarino, G. A., Galasso, S., Pecchio, P., Daghero, D., Gonnelli, R. S., Kurth, F., Iida, K., Holzapfel, B.

“…The temperature dependence of the resistivity of epitaxial Ba(Fe Co ) As thin films (with nominal doping and ) has been analysed and compared with analogous…”
Get full text

Point-contact Andreev-reflection spectroscopy in ReFeAsO1−xFx (Re = La, Sm): Possible evidence for two nodeless gaps by Gonnelli, R.S., Daghero, D., Tortello, M., Ummarino, G.A., Stepanov, V.A., Kremer, R.K., Kim, J.S., Zhigadlo, N.D., Karpinski, J.

Get full text

Evidence for single-gap superconductivity in Mg(B1-xCx)2 single crystals with x=0.132 from point-contact spectroscopy by GONNELLI, R. S, DAGHERO, D, CALZOLARI, A, UMMARINO, G. A, DELLAROCCA, Valeria, STEPANOV, V. A, KAZAKOV, S. M, ZHIGADLO, N, KARPINSKI, J

Get full text

Predictions of Multiband s± Strong-Coupling Eliashberg Theory Compared to Experimental Data in Iron Pnictides by Ummarino, G. A., Daghero, D., Tortello, M., Gonnelli, R. S.

“…The experimental critical temperatures and the gap values of the superconducting materials LaFeAsO 1− x F x , SmFeAsO 1− x F x and Ba 1− x K x Fe 2 As 2 ,…”
Get full text

Carbon substitutions in MgB2 within the two-band eliashberg theory by UMMARINO, G. A, DAGHERO, D, GONNELLI, R. S, MOUDDEN, A. H

Get full text

Point-contact Andreev-reflection spectroscopy in MgB2: The role of substitutions by Gonnelli, R.S., Daghero, D., Ummarino, G.A., Tortello, M., Delaude, D., Stepanov, V.A., Karpinski, J.

“…We summarize the results of point-contact Andreev-reflection (PCAR) spectroscopy in MgB2 doped by chemical substitutions, either magnetic (Mn) or non-magnetic…”
Get full text

Point-Contact Andreev-Reflection Spectroscopy in Fe-Based Superconductors: Multigap Superconductivity and Strong Electron–Boson Interaction by Tortello, M., Daghero, D., Ummarino, G. A., Stepanov, V. A., Zhigadlo, N. D., Karpinski, J., Jiang, J., Gonnelli, R. S.

“…We performed point-contact Andreev-reflection measurements in Ba(Fe 1− x Co x ) 2 As 2 single crystals ( x =0.1, T c =24.5 K) and SmFeAsO 1− x F x polycrystals…”
Get full text

The Order-Parameter Symmetry and Fermi Surface Topology of 122 Fe-Based Superconductors: A Point-Contact Andreev-Reflection Study by Gonnelli, R. S., Tortello, M., Daghero, D., Pecchio, P., Galasso, S., Stepanov, V. A., Bukowski, Z., Zhigadlo, N. D., Karpinski, J., Iida, K., Holzapfel, B.

“…We report on the results of directional point-contact Andreev-reflection (PCAR) measurements in Ba(Fe 1− x Co x ) 2 As 2 single crystals and epitaxial c -axis…”
Get full text

Neutron irradiation effects on two gaps in MgB2 by Ferrando, V., Affronte, M., Daghero, D., Di Capua, R., Tarantini, C., Putti, M.

“…In this paper, an overview of the gaps behaviour as a function of disorder in neutron-irradiated samples is presented. The general effects of neutron…”
Get full text