120 citations · 120 across the 3 of their papers we have counts for
5 papers
Al substitution in MgB2 crystals: influence on superconducting and structural properties
J. Karpinski, N. D. Zhigadlo, G. Schuck +11
Single crystals of Mg1-xAlxB2 have been grown at a pressure of 30 kbar using the cubic anvil technique. Precipitation free crystals with x < 0.1 were obtained as a result of optimi…
A Point-Contact Study of the Superconducting Gaps in Al-Substituted and C-Substituted MgB_2 Single Crystals
R. S. Gonnelli, D. Daghero, G. A. Ummarino +6
We present the results of directional point-contact spectroscopy in state-of-the-art Mg_{1-x}Al_xB_2 and Mg(B_{1-y}C_{y})_2 single crystals produced at ETH, Zurich. Fitting the con…
Point-contact study of gap amplitude and symmetry in RuSr_2GdCu_2O_8
G. A. Ummarino, A. Calzolari, D. Daghero +4
We present the results of point-contact spectroscopy measurements in polycrystalline RuSr_2GdCu_2O_8 samples previously characterized from both the structural and the electrical po…
Anomalies in the ab-plane resistivity of strongly underdoped La_{2-x}Sr_{x}CuO_{4} single crystals: possible charge stripe ordering?
R. S. Gonnelli, V. A. Stepanov, A. Morello +5
We present and discuss the results of measurements of the ab-plane resistivity of La_{2-x}Sr_{x}CuO_{4} single crystals with small Sr contents (x=0.052-0.075). The resistivity was…
Solution of real-axis Eliashberg equations with different pair symmetries and tunneling density of states
G. A. Ummarino, R. S. Gonnelli, D. Daghero
The real-axis direct solution of the Eliashberg equations for the retarded electron-boson interaction in the half-filling case and in the presence of impurities is obtained for six…