27

R. S. Gonnelli, G. A. Ummarino, V. A. Stepanov

The quasiparticle density of states of optimally-doped Bi 2212:
break-junction vs. vacuum tunneling measurements

“Stripes and related phenomena”, edited by A. Bianconi and N. L. Saini
(Kluwer Academic/Plenum Publisher), 377 (2000)

28

G. A. Ummarino, R. S. Gonnelli

d-wave solution of Eliashberg equations and tunneling density of states
in optimally-doped high-T_c superconductors

“Stripes and related phenomena”, edited by A. Bianconi and N. L. Saini
(Kluwer Academic/Plenum Publisher), 407 (2000)

29

R. S. Gonnelli, V. A. Stepanov, A. Morello, G. A. Ummarino, D. Daghero, L. Natale, Francesca Licci, G. Ubertalli

ab-plane resistivity and possible charge stripe ordering
in strongly underdoped La_2-xSr_xCuO₄ single crystals

Physica C, 341-348, 1779-1780 (2000)

30

R. S. Gonnelli, V. A. Stepanov, A. Morello, G. A. Ummarino, G. Behr, G. Graw, S. V. Shulga, S. L. Drechsler

Resistivity and electron-phonon coupling in YNi₂B₂C single crystals

Physica C, 341-348, 1957-1958 (2000)

31

G. A. Ummarino, R. S. Gonnelli

s- and d-wave solution of Eliashberg equations with finite bandwidth

Physica C, 341-348, 295-296 (2000)

32

G. A. Ummarino, R. S. Gonnelli, D. Daghero

Solution of real-axis Eliashberg equations with different pair symmetries
and tunneling density of states

Physica C, 341-348, 299-300 (2000)

33

G. A. Ummarino, R. S. Gonnelli, D. Daghero

Real-axis solution of Eliashberg equations in various order-parameter symmetries
and the tunneling conductance of optimally-doped HTCS

International Journal of Modern Physics B, 14, 2944-2949 (2000)

34

R. S. Gonnelli, V. A. Stepanov, A. Morello, G. A. Ummarino, G. Behr, G. Graw, S. V. Shulga, S. L. Drechsler

Electron-phonon coupling origin of the resistivity in YNi₂B₂C single crystals

International Journal of Modern Physics B, 14, 2840-2845 (2000)

35

R. S. Gonnelli, V. A. Stepanov, A. Morello, G. A. Ummarino, D. Daghero, L. Natale, Francesca Licci, G. Ubertalli

Possible evidence charge stripe ordering in the ab-plane resistivity
of strongly underdoped La_2-xSr_xCuO₄ single crystals

International Journal of Modern Physics B, 14, 2779-2784 (2000)

36

R. S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G. A. Ummarino, V. A. Stepanov, M. Ferretti

Temperature and doping dependence of Andreew reflection
in Au/La_2-xSr_xCuO₄ point-contact junctions

International Journal of Modern Physics B, 14, 3472-3479 (2000)

37

E. Cappelluti, C. Grimaldi, L. Pietronero, S. Strassler, G. A. Ummarino

Superconductivity of Rb₃C₆₀: breakdown of the Migdal-Eliashberg theory

European Physical Journal B, 21, 383-391, (2001)

38

R. S. Gonnelli, A. Calzolari, D. Daghero, G. A. Ummarino, V. A. Stepanov, G. Giunchi, S. Ceresara, G. Ripamonti

Josephson effect in MgB₂ break junctions

Physical Review Letters, 87, 97001 (2001)

39

R. S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G. A. Ummarino, V. A. Stepanov, M. Ferretti

Evidence for pseudogap and phase-coherence gap separation by Andreev reflection experiments in Au/La_2-xSr_xCuO₄ point-contact junctions

European Physical Journal B (Rapid Notes), 22, 411-414 (2001)

40

G. A. Ummarino, R. S. Gonnelli, D. Daghero

Tunneling conductance of SIN junctions with different gap symmetries and non-magnetic impurities
by direct solution of real-axis Eliashberg equations

Physica C, 377, 292-303 (2002)

41

R. S. Gonnelli, A. Calzolari, D. Daghero, L. Natale, G. A. Ummarino, V. A. Stepanov, M. Ferretti

Andreev reflection in Au/La_2-xSr_xCuO₄ point-contact junctions:
separation between pseudogap and phase-coherence gap

Journal of Physics and Chemistry of Solids, 63/12, 2369-2373 (2002)

42

R. S. Gonnelli, A. Calzolari, D. Daghero, G. A. Ummarino, V. A. Stepanov,
P. Fino, G. Giunchi, S. Ceresara, G. Ripamonti

Temperature and junction-type dependency of Andreev reflection in MgB₂

Journal of Physics and Chemistry of Solids, 63/12, 2319-2323 (2002)

43

R. S. Gonnelli, G. A. Ummarino, D. Daghero, A. Calzolari, V. A. Stepanov, G. Giunchi, P. Fino

Josephson effect and Andreev reflection measurements
in MgB₂ break-junction and point-contact heterostructures

International Journal of Modern Physics B, 16, 1553-1561 (2002)

44

G. A. Ummarino, R. S. Gonnelli, D. Daghero

Eliashberg equations and the phenomenology of field-effect-doped C₆₀

International Journal of Modern Physics B, 16, 1539-1546 (2002)

45

G. A. Ummarino, R. S. Gonnelli

The possible explaination of electric-field-doped C₆₀ phenomenology
in the framework of Eliashberg theory

Physical Review B, 66, 104514 (2002)

46

R. S. Gonnelli, A. Calzolari, D. Daghero, G. A. Ummarino, V. A. Stepanov, G. Giunchi

Josephson effect in MgB₂ break junctions

Highlights INFM, 56-58 (2000-2001)

47

R. S. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, J. Karpinski

Direct evidence for two-band superconductivity in MgB₂ single crystal
from directional point-contact spectroscopy in magnetic field

Physical Review Letters, 89, 247004 (2002)

48

R. S. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, J. Karpinski

Independent determination of the two gaps
by directional point-contact spectroscopy in MgB₂ single crystals

Superconductors: Science and Technology, 16, 171-175 (2003)

49

D. Daghero, R. S. Gonnelli, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, J. Karpinski

Point-contact spectroscopy in MgB₂ single crystal in magnetic field

Physica C, 385, 255-263 (2003)

50

G. A. Ummarino, R. S. Gonnelli, O. V. Dolgov, S. V. Shulga

Electron-phonon spectral function and two-band model in tunneling measurement on MgB₂

International Journal of Modern Physics B, 17, nos. 4, 5, 6, 643-648 (2003)

51

D. Daghero, R. S. Gonnelli, G. A. Ummarino, V. A. Stepanov

Possible evidence of a d+id scenario in La_2-xSr_xCuO₄ by Andreev reflection measurements

International Journal of Modern Physics B, 17, nos. 4, 5, 6, 649-654 (2003)

52

O. V. Dolgov, R. S. Gonnelli, G. A. Ummarino, A. A. Golubov, S. V. Shulga, J. Kortus

Extraction of the electron-phonon-interaction from tunneling data
in the multigap superconductor MgB₂

Physical Review B, 68, 132503 (2003)