Spintronics is the branch of solid-state physics that deals with generating, manipulating, and detecting spin in solid-state platforms. Since spin is a quantity that is not conserved, the detection of spin currents cannot be performed using the usual Ohm’s laws, but instead by converting the spin current into an electrical signal through spin–charge interconversion mechanisms (such as the spin Hall or Rashba–Edelstein effects). At the same time, the design of devices for digital electronics involves the possibility of implementing binary logic, which can be achieved by manipulating the spin direction (spin up or spin down). In this context, the use of magnetic fields is not well suited to integrated electronic devices, whereas the use of electric fields—particularly in semiconductor heterostructures—appears to be a promising route for implementing “spin logic gates.”

The thesis work involves experimental activity focused on:

1. fabrication of nanostructures on CMOS-compatible semiconductor platforms, with geometries designed for the detection of spin-dependent signals;
2. measurements of spin current interconversion and transport as a function of temperature and under applied magnetic fields;
3. data analysis aimed at extracting figures of merit relevant for devices, such as spin–charge interconversion efficiency, spin manipulation, and transport lengths.

The thesis, conducted mainly at the SemiSpin laboratory of the Department of Physics under the supervision of Prof. Federico Bottegoni, will involve the student in:

1. cleanroom activities (LNESS) for device fabrication, carried out in collaboration with Dr. Monica Bollani;
2. the use of advanced instrumentation for magneto-transport measurements to quantify electrical readout induced by orbital signals;
3. developing methodological skills and autonomy in the critical analysis of results (validation, comparison with literature, physical interpretation, and proposal of improvements).

During the thesis, the skills acquired by the student will not remain confined to the project but will constitute a solid cultural and professional asset, applicable both in academia and in highly qualified positions in the high-tech job market. The expected duration is approximately 9 months, with flexible but continuous commitment (compatible with academic requirements). Interested students may contact Prof. Federico Bottegoni.