37 citations · 140 across the 12 of their papers we have counts for
12 papers
Ginzburg-Landau Theory for Confined Thin-Film Superconductors
Giovanni A. Ummarino, Alessio Zaccone
We develop a Ginzburg-Landau theory for superconducting thin films under quantum confinement. Starting from the Ginzburg-Landau theory and the recently developed confinement theory…
Prediction of new superconducting bilayers heterostructures using quantum confinement and proximity effects
Giovanni A. Ummarino, Alessio Zaccone
A central challenge in nanoscale superconductivity is to understand and exploit the combined action of quantum confinement and proximity effects in experimentally realistic metalli…
Eliashberg theory prediction of critical currents in superconducting thin films under DC electric fields
Giovanni Alberto Ummarino, Alessio Zaccone, Alessandro Braggio +1
Superconducting thin metallic films, functioning as supercurrent gate-tunable transistors, have considerable potential for future quantum electronic devices. Despite extensive rese…
Upper critical magnetic field and multiband superconductivity in artificial high-Tc superlattices of nano quantum wells
G. Campi, A. Alimenti, G. Logvenov +10
Artificial high-Tc superlattices (AHTS) composed of quantum building blocks with tunable superconducting critical temperature have been synthesized by engineering their nanoscale g…
Possible superconductivity in very thin magnesium films
Giovanni Alberto Ummarino, Alessio Zaccone
It is known that noble metals such as gold, silver and copper are not supercon- 1 ductors, so as magnesium. This is due to the weakness of the electron-phonon interaction 2 which m…
Microscopic mechanism of electric field-induced superconductivity suppression in metallic thin films
Alessio Zaccone, Giovanni A. Ummarino, Alessandro Braggio +1
Supercurrent field-effect transistors made from thin metallic films are a promising option for next-generation high-performance computation platforms. Despite extensive research, t…
Can the noble metals (Au, Ag and Cu) be superconductors?
Giovanni A. Ummarino, Alessio Zaccone
It is common knowledge that noble metals are excellent conductors but do not exhibit superconductivity. On the other hand, quantum confinement in thin films has been consistently s…
Magnetic penetration depth of Aluminum thin films
David López-Núñez, Alba Torras-Coloma, Queralt Portell Montserrat +5
We present a study of the superconducting penetration depth in aluminum thin films of varying thickness. The range of thicknesses chosen spans from the thin-film regime to the…
Analysis of the London penetration depth in Ni-doped CaKFe4As4
D. Torsello, K. Cho, K. R. Joshi +10
We report combined experimental and theoretical analysis of superconductivity in CaK(FeNi)As (CaK1144) for 0, 0.017 and 0.034. To obtain the superfluid dens…
Proximity Eliashberg theory of electrostatic field-effect-doping in superconducting films
G. A. Ummarino, E. Piatti, D. Daghero +4
We calculate the effect of a static electric field on the critical temperature of a s-wave one band superconductor in the framework of proximity effect Eliashberg theory. In the we…
Control of bulk superconductivity in a BCS superconductor by surface charge doping via electrochemical gating
E. Piatti, D. Daghero, G. A. Ummarino +7
The electrochemical gating technique is a powerful tool to tune the \textit{surface} electronic conduction properties of various materials by means of pure charge doping, but its e…
A phenomenological multiband Eliashberg model for LiFeAs
G A Ummarino, Sara Galasso, A Sanna
The phenomenology of LiFeAs superconductor can be explained in the framework of a four-band s-wave Eliashberg theory. We have examined the experimental data available in liter…