Boosting the electron spin coherence in binuclear Mn complexes by multiple microwave pulses

R. Zaripov, E. Vavilova, V. Miluykov, I. Bezkishko, O. Sinyashin, K. Salikhov, V. Kataev, and B. Büchner
Phys. Rev. B 88, 094418 – Published 12 September 2013

Abstract

We investigate a possibility to enhance the coherence time of electron spins in magnetic molecular complexes by application of the Carr-Purcell-Meiboom-Gill (CPMG) multiple microwave pulse sequence. Our theoretical analysis shows that the CPMG sequence can efficiently suppress the spin decoherence channel arising due to spectral diffusion induced by a random modulation of the hyperfine interaction which is an important source of the spin dephasing in molecular magnets. We confirm this by employing the CPMG protocol in pulse electron spin resonance experiments on model binuclear 1,2-diphosphacyclopentadienyl manganese complexes. We show that, compared to the standardly used two-pulse primary spin-echo technique, the CPMG experiment can boost the phase memory time up to one order of magnitude, bringing it to above 10 μs at low temperatures. This finding may be important for the implementation of quantum computation protocols on molecular magnets. We discuss a possible interesting analogy with the Zeno's paradox in quantum theory (the Zeno quantum effect), which could be implicit in the CPMG experiment.

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  • Received 18 July 2013

DOI:https://doi.org/10.1103/PhysRevB.88.094418

©2013 American Physical Society

Authors & Affiliations

R. Zaripov1, E. Vavilova1,2, V. Miluykov3, I. Bezkishko3, O. Sinyashin3, K. Salikhov1, V. Kataev2, and B. Büchner2,4

  • 1Zavoisky Physical-Technical Institute, Kazan Scientific Center of Russian Academy of Sciences, 420029 Kazan, Russia
  • 2Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01171 Dresden, Germany
  • 3A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, Kazan, Russia
  • 4Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany

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Issue

Vol. 88, Iss. 9 — 1 September 2013

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