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giovanni alberto ummarino
giovanni alberto ummarino
Politecnico di Torino, Turin, Italy; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moskva, Russia
Verified email at polito.it
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Year
Direct Evidence for Two-Band Superconductivity in Single Crystals <?format ?>from Directional Point-Contact Spectroscopy in Magnetic Fields
RS Gonnelli, D Daghero, GA Ummarino, VA Stepanov, J Jun, ...
Physical review letters 89 (24), 247004, 2002
3192002
Al substitution in crystals: Influence on superconducting and structural properties
J Karpinski, ND Zhigadlo, G Schuck, SM Kazakov, B Batlogg, K Rogacki, ...
Physical Review B—Condensed Matter and Materials Physics 71 (17), 174506, 2005
1422005
Directional point-contact Andreev-reflection spectroscopy of Fe-based superconductors: Fermi surface topology, gap symmetry, and electron–boson interaction
D Daghero, M Tortello, GA Ummarino, RS Gonnelli
Reports on Progress in Physics 74 (12), 124509, 2011
1282011
Two-band Eliashberg equations and the experimental Tc of the diboride Mg1− xAlxB2
GA Ummarino, RS Gonnelli, S Massidda, A Bianconi
Physica C: Superconductivity 407 (3-4), 121-127, 2004
1032004
Independent determination of the two gaps by directional point-contact spectroscopy in MgB2 single crystals
RS Gonnelli, D Daghero, GA Ummarino, VA Stepanov, J Jun, ...
Superconductor Science and Technology 16 (2), 171, 2002
1002002
Multigap Superconductivity and Strong Electron-Boson Coupling in Fe-Based Superconductors: A Point-Contact Andreev-Reflection Study of Single …
M Tortello, D Daghero, GA Ummarino, VA Stepanov, J Jiang, JD Weiss, ...
Physical review letters 105 (23), 237002, 2010
982010
Large conductance modulation of gold thin films by huge charge injection via electrochemical gating
D Daghero, F Paolucci, A Sola, M Tortello, GA Ummarino, M Agosto, ...
Physical review letters 108 (6), 066807, 2012
872012
Josephson Effect in Break Junctions
RS Gonnelli, A Calzolari, D Daghero, GA Ummarino, VA Stepanov, ...
Physical Review Letters 87 (9), 097001, 2001
842001
Evidence for single-gap superconductivity in Mg (B 1− x C x) 2 single crystals with x= 0.132 from point-contact spectroscopy
RS Gonnelli, D Daghero, A Calzolari, GA Ummarino, V Dellarocca, ...
Physical Review B—Condensed Matter and Materials Physics 71 (6), 060503, 2005
822005
Three-band Eliashberg theory and the superconducting gaps of iron pnictides
GA Ummarino, M Tortello, D Daghero, RS Gonnelli
Physical Review B—Condensed Matter and Materials Physics 80 (17), 172503, 2009
792009
Coexistence of two order parameters and a pseudogaplike feature in the iron-based superconductor
RS Gonnelli, D Daghero, M Tortello, GA Ummarino, VA Stepanov, JS Kim, ...
Physical Review B—Condensed Matter and Materials Physics 79 (18), 184526, 2009
782009
Point-contact Andreev-reflection spectroscopy in ReFeAsO1− xFx (Re= La, Sm): Possible evidence for two nodeless gaps
RS Gonnelli, D Daghero, M Tortello, GA Ummarino, VA Stepanov, ...
Physica C: Superconductivity 469 (9-12), 512-520, 2009
682009
Determination of the tunneling electron-phonon spectral function in high-tC superconductors with energy dependence of the normal density of states
RS Gonnelli, GA Ummarino, VA Stepanov
Physica C: Superconductivity 275 (1-2), 162-171, 1997
661997
Evidence for Gap Anisotropy in from Directional Point-Contact Spectroscopy
RS Gonnelli, D Daghero, D Delaude, M Tortello, GA Ummarino, ...
Physical review letters 100 (20), 207004, 2008
632008
Strong-coupling d-wave superconductivity in PuCoGa5 probed by point-contact spectroscopy
D Daghero, M Tortello, GA Ummarino, JC Griveau, E Colineau, R Eloirdi, ...
Nature communications 3 (1), 786, 2012
622012
Extraction of the electron-phonon interaction from tunneling data in the multigap superconductor
OV Dolgov, RS Gonnelli, GA Ummarino, AA Golubov, SV Shulga, J Kortus
Physical Review B 68 (13), 132503, 2003
582003
Possible mechanism of superconductivity in probed by self-irradiation damage
F Jutier, GA Ummarino, JC Griveau, F Wastin, E Colineau, J Rebizant, ...
Physical Review B—Condensed Matter and Materials Physics 77 (2), 024521, 2008
532008
Andreev-reflection spectroscopy in ZrB12 single crystals
D Daghero, RS Gonnelli, GA Ummarino, A Calzolari, V Dellarocca, ...
Superconductor Science and Technology 17 (5), S250, 2004
522004
Disorder-Driven Transition from to Superconducting Order Parameter in Proton Irradiated Single Crystals
G Ghigo, D Torsello, GA Ummarino, L Gozzelino, MA Tanatar, R Prozorov, ...
Physical Review Letters 121 (10), 107001, 2018
462018
Multiband Eliashberg theory and temperature-dependent spin-resonance energy in iron pnictide superconductors
GA Ummarino
Physical Review B—Condensed Matter and Materials Physics 83 (9), 092508, 2011
462011
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