Determine deformation potential coefficients for hexagonal germanium

Determine the deformation potential coefficients for hexagonal (2H) germanium, via experimental measurements or ab initio calculations, to enable quantitative modeling of deformation-potential–based spin–phonon coupling and relaxation in hexagonal germanium nanowires.

Background

In the discussion of additional spin–phonon coupling mechanisms beyond the lattice reorientation mechanism, the authors note that deformation-potential coupling may contribute to spin relaxation in hexagonal germanium nanowires. However, quantitative evaluation of such mechanisms requires material-specific deformation potential parameters, which are not currently available for hexagonal germanium.

Establishing these coefficients would allow comparisons among different relaxation pathways and support realistic device modeling and design for spin qubits in hexagonal Ge nanowires.