51³Ô¹Ïapp

Mechanical strain is a fundamental effect that can enhance the performance of electronic and quantum devices, such as transistors [] and quantum wells []. High-spin nuclei, such as the spin-7/2 123Sb, contain a quadrupole moment that enables both electrical (nuclear electric resonance or NER) and mechanical [] (nuclear acoustic resonance or NAR) control of spin state transitions. 

Our group demonstrated NER of an 123Sb donor in a silicon-based quantum device [], which led to simulation of a piezoelectric quantum device capable of achieving NAR of an 123Sb donor []. The AlN-based piezoelectric actuator produces an oscillating strain in the donor-implanted silicon device that mechanically drives 123Sb nuclear spin state transitions. We plan to extend these experiments to large mechanical resonators capable of strong spin-phonon coupling, with the aim of investigating the quantum nature of gravity.