Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds

L. P. Le, A. Keren, G. M. Luke, B. J. Sternlieb, W. D. Wu, Y. J. Uemura, J. H. Brewer, T. M. Riseman, R. V. Upasani, L. Y. Chiang, W. Kang, P. M. Chaikin, T. Csiba, G. Grüner

    Research output: Contribution to journalArticle

    Abstract

    Muon-spin-rotation and relaxation (μSR) studies of the organic compounds (TMTSF)2-X (X=PF6, NO3, and ClO4) at ambient pressure are reported. We observe spin-density-wave (SDW) states in all three compounds under zero external magnetic field. The onset of the SDW is extremely sharp, which may indicate a first-order transition. The sublattice magnetization (or SDW amplitude) in the PF6 compound exhibits significant reduction with increasing temperature at low temperatures, which demonstrates the existence of collective low-energy excitations, in addition to the single-particle excitations across the SDW gap. The large spin-wave stiffness we observe in this system is incompatible with a Heisenberg model for a localized spin system; this demonstrates the importance of using an itinerant-electron picture to describe the magnetic behavior of this system. The broad distribution of local magnetic fields deduced from the μSR time spectra is consistent with that expected from an incommensurate SDW. The magnitude of the internal field at T→0 is approximately the same for the three systems, suggesting a common SDW amplitude in these systems. Transverse-field μSR measurements in the relaxed-state ClO4 system show no visible enhancement of the relaxation rate in the superconducting state down to 0.1 K, providing a lower limit for the superconducting penetration depth λab′≥12 000.

    Original languageEnglish (US)
    Pages (from-to)7284-7296
    Number of pages13
    JournalPhysical Review B
    Volume48
    Issue number10
    DOIs
    StatePublished - 1993

    Fingerprint

    Spin density waves
    muon spin rotation
    Magnetic fields
    Spin waves
    Excitation energy
    Organic compounds
    Relaxation time
    Magnetization
    Stiffness
    organic compounds
    magnetic fields
    Temperature
    sublattices
    magnons
    excitation
    Electrons
    stiffness
    penetration
    relaxation time
    magnetization

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Le, L. P., Keren, A., Luke, G. M., Sternlieb, B. J., Wu, W. D., Uemura, Y. J., ... Grüner, G. (1993). Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds. Physical Review B, 48(10), 7284-7296. https://doi.org/10.1103/PhysRevB.48.7284

    Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds. / Le, L. P.; Keren, A.; Luke, G. M.; Sternlieb, B. J.; Wu, W. D.; Uemura, Y. J.; Brewer, J. H.; Riseman, T. M.; Upasani, R. V.; Chiang, L. Y.; Kang, W.; Chaikin, P. M.; Csiba, T.; Grüner, G.

    In: Physical Review B, Vol. 48, No. 10, 1993, p. 7284-7296.

    Research output: Contribution to journalArticle

    Le, LP, Keren, A, Luke, GM, Sternlieb, BJ, Wu, WD, Uemura, YJ, Brewer, JH, Riseman, TM, Upasani, RV, Chiang, LY, Kang, W, Chaikin, PM, Csiba, T & Grüner, G 1993, 'Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds', Physical Review B, vol. 48, no. 10, pp. 7284-7296. https://doi.org/10.1103/PhysRevB.48.7284
    Le LP, Keren A, Luke GM, Sternlieb BJ, Wu WD, Uemura YJ et al. Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds. Physical Review B. 1993;48(10):7284-7296. https://doi.org/10.1103/PhysRevB.48.7284
    Le, L. P. ; Keren, A. ; Luke, G. M. ; Sternlieb, B. J. ; Wu, W. D. ; Uemura, Y. J. ; Brewer, J. H. ; Riseman, T. M. ; Upasani, R. V. ; Chiang, L. Y. ; Kang, W. ; Chaikin, P. M. ; Csiba, T. ; Grüner, G. / Muon-spin-rotation and relaxation studies in (TMTSF)2-X compounds. In: Physical Review B. 1993 ; Vol. 48, No. 10. pp. 7284-7296.
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    AU - Le, L. P.

    AU - Keren, A.

    AU - Luke, G. M.

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    AU - Wu, W. D.

    AU - Uemura, Y. J.

    AU - Brewer, J. H.

    AU - Riseman, T. M.

    AU - Upasani, R. V.

    AU - Chiang, L. Y.

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    AU - Grüner, G.

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