Probing spin-electric transitions in a molecular exchange qubit.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39885147.
- Also identified by DOI 10.1038/s41467-025-56453-1 and PMC identifier 11782546.
- Licence recorded as CC BY-NC-ND.
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Abstract
Electric fields represent an ideal means for controlling spins at the nanoscale and, more specifically, for manipulating protected degrees of freedom in multispin systems. Here we perform low-temperature magnetic far-IR spectroscopy on a molecular spin triangle (Fe<sub>3</sub>) and provide initial experimental evidence suggesting spin-electric transitions in polynuclear complexes. The co-presence of electric- and magnetic-dipole transitions, allows us to estimate the spin-electric coupling. Based on spin Hamiltonian simulations of the spectra, we identify the observed transitions and introduce the concept of a generalized exchange qubit. This applies to a wide class of molecular spin triangles, and includes the scalar chirality and the partial spin sum qubits as special cases.