Majorana quasiparticles in hybrid nanostructures

Speaker: Prof. dr hab. Ireneusz Weymann  

Affiliation: Institute of Spintronics and Quantum Information, Faculty of Physics and Astronomy

Abstract: The search of Majorana fermions, particles that are their own antiparticles, has triggered a considerable interest in the physics community. Although their existence is still elusive, the fate of Majoranas has stimulated extensive research in the field of condensed matter, when it turned out that zero-energy bound states of topological superconducting nanowires may behave as Majorana quasiparticles. The presence of topologically-protected Majorana bound states that form at the ends of such wire is signaled by a zero-bias peak in the system’s conductance. Moreover, their existence is also revealed in transport properties of attached quantum dots, where the effect of Majorana modes leaking was found to give rise to fractional values of the conductance through quantum dot. In this talk, I will present recent results on the transport characteristics of hybrid nanostructures consisting of topological superconducting nanowires attached to quantum dots. The focus will be put on strong electron correlations and transport regimes, where the Kondo effect can coexist with topologically-protected Majorana modes leading to unique transport behavior.

Chairman: Bartlomiej Graczykowski

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