In tensile-strained Ge/GeSn light-hole qubits, hyperfine coupling is dominated by the Fermi contact term via s-type conduction-band admixtures, and it grows with Sn barrier concentration.
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Light-hole states and hyperfine interaction in electrically-defined Ge/GeSn quantum dots
In tensile-strained Ge/GeSn light-hole qubits, hyperfine coupling is dominated by the Fermi contact term via s-type conduction-band admixtures, and it grows with Sn barrier concentration.