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Volumn 79, Issue 6, 2009, Pages

Theory of severe slowdown in the relaxation of rings and clusters with antiferromagnetic interactions

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EID: 62349122727     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.064421     Document Type: Article
Times cited : (13)

References (28)
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    • Magnetic clusters with s=1/2 must be treated separately since they do not have a quadrupole moment and thus a different relaxation channel (e.g., dipolar channel or fluctuating Dzyaloshinskii-Moriya interactions) must be invoked.
    • Magnetic clusters with s=1/2 must be treated separately since they do not have a quadrupole moment and thus a different relaxation channel (e.g., dipolar channel or fluctuating Dzyaloshinskii-Moriya interactions) must be invoked.
  • 7
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    • For frustrated clusters see, e.g. 10.1103/PhysRevB.77.094420
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    • Rousochatzakis, I.1    Läuchli, A.M.2    Mila, F.3
  • 14
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    • As expected, only the m 0 components of Q can drive the relaxation of Sz.
    • As expected, only the m 0 components of Q can drive the relaxation of Sz.
  • 17
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    • Here, the spectral density for any pair of operators A and B is defined as JAB (ω) = - dt eiωt A (0) B (t)
    • Here, the spectral density for any pair of operators A and B is defined as JAB (ω) = - dt eiωt A (0) B (t).
  • 18
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    • Note that there is no absorption line at Δ0 ± ωe since transitions from the ground state to the lowest triplet are forbidden by symmetry for our quadrupolar spin-phonon coupling.
    • Note that there is no absorption line at Δ0 ± ωe since transitions from the ground state to the lowest triplet are forbidden by symmetry for our quadrupolar spin-phonon coupling.
  • 19
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    • Ph.D. thesis, Iowa State University
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    • (2005)
    • Rousochatzakis, I.1
  • 20
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    • For L7 i NMR in Fe6 Li, one must multiply Eq. 13 with an extra factor of N=6 since the nuclear spin resides at the center of the ring and thus all ions contribute equally to the nuclear relaxation.
    • For L7 i NMR in Fe6 Li, one must multiply Eq. 13 with an extra factor of N=6 since the nuclear spin resides at the center of the ring and thus all ions contribute equally to the nuclear relaxation.
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    • This is an approximate lower bound of ωD since, as can be understood from Fig. 2, larger values do not alter ωc quantitatively at intermediate T.
    • This is an approximate lower bound of ωD since, as can be understood from Fig. 2, larger values do not alter ωc quantitatively at intermediate T.
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