Publication on Spin Pumping in Epitaxial Ge1-xSnx Alloys

Longo E., Concepción O., Mantovan R., Fanciulli M., Myronov M., Bonera E., Pedrini J., Buca D., Pezzoli F., Spin Pumping in Epitaxial Ge1-xSnx Alloys, (2024) Advanced Quantum Technologies

Ge₁₋ₓSnₓ/Co hybrids enable room-temperature spin current emission and detection, making GeSn alloys promising candidates for spintronics applications alongside photonics and electronics.

Spin-pumping efficiency peaks at ~10% Sn, independent of strain, and surpasses that of elemental Ge, showing enhanced spin current injection in GeSn alloys.

Magnetization dynamics exhibit non-monotonic behavior, with unusual trends in Gilbert damping and spin mixing conductance, revealing complex spin scattering and relaxation mechanisms in GeSn systems.