Optically Active Single Hole Spin in ZnSe

• URL: http://arxiv.org/abs/2607.00110v1
• Date: Tue, 30 Jun 2026 19:49:57 GMT
• Title: Optically Active Single Hole Spin in ZnSe
• Abstract summary: Hole spins offer a pathway to extended coherence times by decoupling from nuclear magnetic noise.<n>InSe, realizing this potential has been limited by p-doping challenges.<n>We isolate a single-hole spin bound to a shallow acceptor, confirmed by antibunching and accessed via the fast (244 pfactors) radiative recombination of a bound exciton.<n>Magnetic resonance and Raman spectroscopy of the ground state reveal an effective hole g of 0.7 and an optical linewidth of 26.7 GHz.
• Score: 30.617053556305915
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Semiconductor hole spins offer a pathway to extended coherence times by decoupling from nuclear magnetic noise, while their spin-orbit coupling enables fast all-electrical control. In ZnSe, however, realizing this potential has been limited by p-doping challenges. Here, we circumvent this limit by optically activating acceptors within the ZnSe quantum well. We isolate a single-hole spin bound to a shallow acceptor, confirmed by antibunching and accessed via the fast (244 ps) radiative recombination of a bound exciton. Magnetic and Raman spectroscopy of the ground state reveal an effective hole g-factor of 0.7 and an optical resonance linewidth of 26.7 GHz. Complementary first-principles simulations, together with the experimental results, provide evidence that points toward nitrogen as the most likely acceptor impurity. These results introduce a promising new platform for optically active spin qubits and single-photon sources in ZnSe.

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