Quantum Interference Phenomena in the Local Polarization Dynamics of Mesoscopic Systems: An NMR Observation
arXiv:cond-mat/9609036 · doi:10.1016/0009-2614(96)00978-5
Abstract
It was predicted that local spin polarization in a ring of five dipolar coupled spins should present a particular fingerprint of quantum interferences reflecting both the discrete and finite nature of the system [Phys. Rev. Lett. 75 (1995) 4310]. We report its observation for the proton system of a (CH)Fe molecule using a rare C as {\it local probe}. Novel high frequency (Hz) polarization oscillations appear because incomplete C-H cross-polarization transfer {\it splits} the polarization state, in a portion that wanders in the proton system and one that remains in the C. They interfere with each other after rejoining.
12 pages, RevTex, 4 Figures available upon request, to appear in Chemical Physics Letters
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