Bruzzese PC, Liao YK, Donà L, Civalleri B, Salvadori E, Chiesa M. Spin-Lattice Relaxation and Spin-Phonon Coupling of
ns
1 Metal Ions at the Surface.
J Phys Chem Lett 2024:7161-7167. [PMID:
38967545 DOI:
10.1021/acs.jpclett.4c01634]
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Abstract
To use transition metal ions for spin-based applications, it is essential to understand fundamental contributions to electron spin relaxation in different ligand environments. For example, to serve as building blocks for a device, transition metal ion-based molecular qubits must be organized on surfaces and preserve long electron spin relaxation times, up to room temperature. Here we propose monovalent group 12 ions (Zn+ and Cd+) as potential electronic metal qubits with an ns1 ground state. The relaxation properties of Zn+ and Cd+, stabilized at the interface of porous aluminosilicates, are investigated and benchmarked against vanadium (3d1) and copper (3d9) ions. The spin-phonon coupling has been evaluated through DFT modeling and found to be negligible for the ns1 states, explaining the long coherence time, up to 2 μs, at room temperature. These so far unexplored metal qubits may represent viable candidates for room temperature quantum operations and sensing.
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