Searching for elusive Majorana fermions on silicon-germanium heterostructures
In 1928, physicist Paul Dirac predicted that every fundamental particle in the Universe has an identical twin but with opposite charge. A fundamental question arises: what happens if a particle is its own antiparticle? Ettore Majorana predicted their existence and evidence has been put forward for the existence of such a state of matter in the form of quasiparticle excitations in hybrid semiconductor-superconductor devices. Recent experiments have found signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices. Research activities have so far concentrated on planar InAs and InSb nanowires. Funded under the Marie Skłodowska-Curie programme, the MaGnum project will look for Majorana bound states in Ge/SiGe heterostructures. These heterostructures should facilitate the detection of the elusive Majorana bound states.
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