Mechanism of Electron Spin Decoherence in a Partially Deuterated Glassy Matrix

Long electron spin coherence lifetimes are essential for applications in quantum information science and electron paramagnetic resonance, for instance, for nanoscale distance measurements in biomolecular systems using double electron–electron resonance. We experimentally investigate the decoherence...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2022-06, Vol.13 (24), p.5474-5479
Main Authors: Jahn, Samuel M., Canarie, Elizabeth R., Stoll, Stefan
Format: Article
Language:English
Subjects:
Electron Spin Resonance Spectroscopy
Electrons
Molecular Dynamics Simulation
Physical Insights into Quantum Phenomena and Function
Protons
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Summary:Long electron spin coherence lifetimes are essential for applications in quantum information science and electron paramagnetic resonance, for instance, for nanoscale distance measurements in biomolecular systems using double electron–electron resonance. We experimentally investigate the decoherence dynamics under the Hahn echo sequence of the organic radical d 18-TEMPO in a variably deuterated frozen water:glycerol matrix. The coherence time (phase memory time) T M scales with proton concentration as [1H]−0.65. For selectively deuterated matrices, decoherence is accelerated in the presence of proton clustering, that is, substantial short-range density in the proton–proton radial distribution functions (
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.2c00939