In this PhD project the student will fabricate hybrid semiconductor-superconductor devices based on InAs/InP core/shell nanowires. The nanowires will be obtained through an already established collaboration with the group of Prof. Lieber (Harvard University). The fabricated devices will be studied by low-temperature magneto-transport measurements down to 10 mK. The student will start by investigating the transport properties of devices involving both normal-type and superconducting contacts. In spite of some recent experimental studies, many open problems remain to be studied, especially in connection to the physics of Andreev bound states, and the completion of different types of electronic correlations (superconducting pairing, Kondo effect, Coulomb interactions). Research efforts will then focus on achieving the stringent conditions (electron density, electric and magnetic fields, proximity effect) required for the development of Majorana modes at the edges of the semiconductor nanowire. The results obtained will provide us important elements and guidelines for the design of experiments aiming at the observation of Majorana fermions.