Neutron diffraction from the vortex lattice in the heavy-fermion superconductor UPt3

R.N. Kleiman, C. Broholm, G. Aeppli, E. Bucher, N. Stücheli, D.J. Bishop, K.N. Clausen, K. Mortensen, J.S. Pedersen, B. Howard

    Research output: Contribution to journalJournal articleResearch

    Abstract

    We have used neutron diffraction to observe the vortex lattice of UPt3. This is the first such measurement in a heavy-fermion system, a superconductor below 1 K, or in a system with such a long magnetic penetration depth (6000 +/- 75 angstrom). It also provides the first value for the pair coherence length, 111 +/- 2 angstrom, to be obtained directly within the pairing state of UPt3. The lattice is oblique hexagonal with conventional quantization. Its anisotropy can be explained by considering a combination of gap and Fermi-surface anisotropies. The lattice does not appear to change near the transitions between the superconducting phases identified by other techniques.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume69
    Issue number21
    Pages (from-to)3120-3123
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1992

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