Decoherence window and electron-nuclear cross relaxation in the molecular magnet V 15

J. H. Shim; S. Bertaina; S. Gambarelli; T. Mitra; A. Müller; E. I. Baibekov; B. Z. Malkin; B. Tsukerblat; B. Barbara

doi:10.1103/PhysRevLett.109.050401

Decoherence window and electron-nuclear cross relaxation in the molecular magnet V ₁₅

J. H. Shim, S. Bertaina, S. Gambarelli, T. Mitra, A. Müller, E. I. Baibekov, B. Z. Malkin, B. Tsukerblat, B. Barbara

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Rabi oscillations in the V ₁₅ single molecule magnet embedded in the surfactant (CH ₃) ₂[CH ₃(CH ₂) ₁₆CH ₂] ₂N ⁺ have been studied at different microwave powers. An intense damping peak is observed when the Rabi frequency Ω _R falls in the vicinity of the Larmor frequency of protons ω _N. The experiments are interpreted by a model showing that the damping (or Rabi) time τ _R is directly associated with decoherence caused by electron-nuclear cross relaxation in the rotating reference frame. This decoherence induces energy dissipation in the range ω _N-σ _e<Ω _R<ω _N, where σ _e is the mean superhyperfine field induced by protons at V ₁₅. Weaker decoherence without dissipation takes place outside this window. Specific estimations suggest that this rapid cross relaxation in a resonant microwave field, observed for the first time in V ₁₅, should also take place, e.g., in Fe ₈ and Mn ₁₂.

Original language	English
Article number	050401
Journal	Physical Review Letters
Volume	109
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.109.050401
State	Published - 31 Jul 2012

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.109.050401

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@article{d34ed7c1b108474299069e8c6bb0a812,

title = "Decoherence window and electron-nuclear cross relaxation in the molecular magnet V 15 ",

abstract = "Rabi oscillations in the V 15 single molecule magnet embedded in the surfactant (CH 3) 2[CH 3(CH 2) 16CH 2] 2N + have been studied at different microwave powers. An intense damping peak is observed when the Rabi frequency Ω R falls in the vicinity of the Larmor frequency of protons ω N. The experiments are interpreted by a model showing that the damping (or Rabi) time τ R is directly associated with decoherence caused by electron-nuclear cross relaxation in the rotating reference frame. This decoherence induces energy dissipation in the range ω N-σ e<Ω R<ω N, where σ e is the mean superhyperfine field induced by protons at V 15. Weaker decoherence without dissipation takes place outside this window. Specific estimations suggest that this rapid cross relaxation in a resonant microwave field, observed for the first time in V 15, should also take place, e.g., in Fe 8 and Mn 12.",

author = "Shim, {J. H.} and S. Bertaina and S. Gambarelli and T. Mitra and A. M{\"u}ller and Baibekov, {E. I.} and Malkin, {B. Z.} and B. Tsukerblat and B. Barbara",

year = "2012",

month = jul,

day = "31",

doi = "10.1103/PhysRevLett.109.050401",

language = "English",

volume = "109",

journal = "Physical Review Letters",

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T1 - Decoherence window and electron-nuclear cross relaxation in the molecular magnet V 15

AU - Shim, J. H.

AU - Bertaina, S.

AU - Gambarelli, S.

AU - Mitra, T.

AU - Müller, A.

AU - Baibekov, E. I.

AU - Malkin, B. Z.

AU - Tsukerblat, B.

AU - Barbara, B.

PY - 2012/7/31

Y1 - 2012/7/31

N2 - Rabi oscillations in the V 15 single molecule magnet embedded in the surfactant (CH 3) 2[CH 3(CH 2) 16CH 2] 2N + have been studied at different microwave powers. An intense damping peak is observed when the Rabi frequency Ω R falls in the vicinity of the Larmor frequency of protons ω N. The experiments are interpreted by a model showing that the damping (or Rabi) time τ R is directly associated with decoherence caused by electron-nuclear cross relaxation in the rotating reference frame. This decoherence induces energy dissipation in the range ω N-σ e<Ω R<ω N, where σ e is the mean superhyperfine field induced by protons at V 15. Weaker decoherence without dissipation takes place outside this window. Specific estimations suggest that this rapid cross relaxation in a resonant microwave field, observed for the first time in V 15, should also take place, e.g., in Fe 8 and Mn 12.

AB - Rabi oscillations in the V 15 single molecule magnet embedded in the surfactant (CH 3) 2[CH 3(CH 2) 16CH 2] 2N + have been studied at different microwave powers. An intense damping peak is observed when the Rabi frequency Ω R falls in the vicinity of the Larmor frequency of protons ω N. The experiments are interpreted by a model showing that the damping (or Rabi) time τ R is directly associated with decoherence caused by electron-nuclear cross relaxation in the rotating reference frame. This decoherence induces energy dissipation in the range ω N-σ e<Ω R<ω N, where σ e is the mean superhyperfine field induced by protons at V 15. Weaker decoherence without dissipation takes place outside this window. Specific estimations suggest that this rapid cross relaxation in a resonant microwave field, observed for the first time in V 15, should also take place, e.g., in Fe 8 and Mn 12.

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JF - Physical Review Letters

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ER -

Decoherence window and electron-nuclear cross relaxation in the molecular magnet V ₁₅

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