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A fast control of spins is a major quest in spintronic systems. Ultrashort light pulses have been utilized to trigger and detect the spin dynamics of electrons in magnetic materials and multilayers. Recently, three-dimensional topological insulators have received attention due to the existence, within the insulating band gap of bulk states, of spin-polarized surface states that are protected from...
We successfully synthesized a semiconducting zinc stannate (Zn2SnO4) - with a face-centred cubic spinel structure, a band gap (Eg = 3.4eV), and a crystallite size of 29 nm - by co-precipitation. Post-thermal treatment revealed three transition temperatures: 500 °C, 700 °C and 1000 °C. We systematically monitored the formation of different nanostructures by changing the annealing temperature through...
A full exploitation of the unique features of graphene and related 2D materials in micro and nano-scaled optoelectronic devices for high-data rate photonic systems calls for a deep understanding of their fundamental structural, electronic, photophysical properties and fast dynamics. We introduce some advanced spectroscopic techniques developed to this aim, while reviewing their specific potentialities...
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