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Crossed Andreev reflection-induced magnetoresistance
F. Giazotto, F. Taddei, R. Fazio +1
We show that very large negative magnetoresistance can be obtained in magnetic trilayers in a current-in-plane geometry owing to the existence of crossed Andreev reflection. This s…
In_(0.75)Ga_(0.25)As on GaAs submicron rings and their application for coherent nanoelectronic devices
Franco Carillo, Giorgio Biasiol, Diego Frustaglia +3
Electron-phase modulation in magnetic and electric fields will be presented in In_(0.75)Ga_(0.25)As Aharonov-Bohm (AB) rings. The zero Schottky barrier of this material made it pos…
Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
Francesco Giazotto, Tero T. Heikkila, Arttu Luukanen +2
This review presents an overview of the thermal properties of mesoscopic structures. The discussion is based on the concept of electron energy distribution, and, in particular, on…
Superconductor-semiconductor magnetic microswitch
C. Castellana, F. Giazotto, M. Governale +2
A hybrid superconductor--two-dimensional electron gas microdevice is presented. Its working principle is based on the suppression of Andreev reflection at the superconductor-semico…
Andreev reflection and cyclotron motion at superconductor -- normal-metal interfaces
F. Giazotto, M. Governale, U. Zuelicke +1
We investigate Andreev reflection at the interface between a superconductor and a two--dimensional electron system (2DES) in an external magnetic field such that cyclotron motion i…
Anti-crossings of spin-split Landau levels in an InAs two-dimensional electron gas with spin-orbit coupling
W. Desrat, F. Giazotto, V. Pellegrini +5
We report tilted-field transport measurements in the quantum-Hall regime in an InAs/In_0.75Ga_0.25As/In_0.75Al_0.25As quantum well. We observe anti-crossings of spin-split Landau l…