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Your search keyword '"Lombardi, F."' showing total 23 results
Start Over Author "Lombardi, F." Journal physica c: superconductivity and its applications
23 results on '"Lombardi, F."'

22. Josephson effect in Al/Bi2Se3/Al coplanar hybrid devices

Author

Kazuo Kadowaki, Sophie Charpentier, Floriana Lombardi, Riccardo Arpaia, Yusuke Suzuki, Arturo Tagliacozzo, Luca Galletti, F. Tafuri, P. Lucignano, Davide Massarotti, Thilo Bauch, L., Galletti, S., Charpentier, P., Lucignano, D., Massarotti, R., Arpaia, Tafuri, Francesco, A., Tagliacozzo, T., Bauch, K., Kadowaki, F., Lombardi, Galletti, L., Charpentier, S., Lucignano, P., Massarotti, D., Arpaia, R., Tafuri, F., Bauch, T., Suzuki, Y., Tagliacozzo, A., Kadowaki, K., and Lombardi, F.

Subjects
Josephson effect, Superconductivity, Coupling, Condensed matter physics, business.industry, Energy Engineering and Power Technology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, MAJORANA, Topological insulator, Proximity effect (audio), Optoelectronics, Electrical and Electronic Engineering, Electronic band structure, business, Topology (chemistry)
Abstract

The edge states of Topological Insulators (TI) are protected against backscattering, thanks to the topological properties arising from their band structure. Coupling a TI to a superconductor (S) can induce unconventional effects, including the creation of Majorana bound states (MBS). The fabrication of coplanar hybrid devices is a fundamental step to pave the way to the understanding of proximity effects in topologically non-trivial systems, and to a large variety of experiments aimed at the possible detection of MBS. We discuss the feasibility and some relevant properties of Al-Bi2Se3-Al coplanar proximity devices. Special attention is devoted to the design of the junction, aimed at enhancing the coupling between the electrodes and the TI.

Published
2014

23. Quantum behaviors in high-TC systems: Macroscopic and vortex quantum tunneling

Author

Floriana Lombardi, John R. Kirtley, Pasquale Orgiani, Giuseppe Balestrino, Francesco Tafuri, Daniela Stornaiuolo, Antonio Barone, D. Born, D. Dalena, Vladimir G. Kogan, Pier Gianni Medaglia, G. Rotoli, Thilo Bauch, Tafuri, Francesco, Lombardi, Floriana, Bauch, Thilo, Stornaiuolo, Daniela, Born, D, Dalena, D, Barone, A, Rotoli, G, Medaglia, Pg, Orgiani, P, Balestrino, G, Kogan, V, Kirtley, Jr, Lombardi, F, Bauch, T, Stornaiuolo, D, Rotoli, Giacomo, MEDAGLIA P., G, and Kirtley, J. R.

Subjects
YBCO JUNCTIONS, DEGENERATE GROUND-STATE, Physics, Josephson effect, Condensed matter physics, Quantum point contact, Energy Engineering and Power Technology, Macroscopic quantum phenomena, Dissipation, PEARL VORTICES, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Vortex, HIGH-TEMPERATURE SUPERCONDUCTORS, ZERO-VOLTAGE STATE, JOSEPHSON-JUNCTION, Condensed Matter::Superconductivity, Quantum mechanics, CUPRATE SUPERCONDUCTORS, Electrical and Electronic Engineering, Quantum dissipation, QUANTUM MACROSCOPIC TUNNEL, Quantum, Quantum tunnelling
Abstract

We describe the main ideas and some experimental outcomes of two experiments, both aimed to study quantum tunneling effects in high-T-C structures. In the first experiment, macroscopic quantum tunneling is demonstrated in grain boundary YBaCuO Josephson junctions revealing dissipation levels lower than expected and opening novel perspectives for quantum circuitry. In the second, the low temperature dissipation is dominated by quantum tunneling of individual Pearl vortices in ultra-thin CaBaCuO systems characterized by extremely long Pearl lengths. (c) 2006 Elsevier B.V. All rights reserved.

Published
2006

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