Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Without internal affiliation

  • Author: Hong, Tao

    Oak Ridge National Laboratory, United States

  • Author: Kim, Y.H.

    University of Florida

  • Author: Hotta, C.

    Kyoto Sangyo University

  • Author: Takano, Y.

    University of Florida

  • Author: Tremelling, G.

    Clark University

  • Author: Turnbull, M.M.

    Clark University

  • Author: Landee, C.P.

    Clark University

  • Author: Kang, H.-J.

    National Institute of Standards and Technology

  • Author: Christensen, Niels Bech

    Paul Scherrer Institut

  • Author: Lefmann, K.

    University of Copenhagen

  • Author: Schmidt, K.P.

    Technische Universität Dortmund

  • Author: Uhrig, G.S.

    Technische Universität Dortmund

  • Author: Broholm, C.

    Johns Hopkins University

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We study the magnetic-field-induced quantum phase transition from a gapped quantum phase that has no magnetic long-range order into a gapless phase in the spin-1/2 ladder compound bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY). At temperatures below about 1a K, the specific heat in the gapless phase attains an asymptotic linear temperature dependence, characteristic of a Tomonaga-Luttinger liquid. Inelastic neutron scattering and the specific heat measurements in both phases are in good agreement with theoretical calculations, demonstrating that DIMPY is the first model material for an S=1/2 two-leg spin ladder in the strong-leg regime. © 2010 The American Physical Society.
Keyword: Tetrabromocuprate,Specific heat,Theoretical calculations,Specific heat measurement,Ladders,Ladder compounds,Thermal variables measurement,Phase transitions,Quantum phase,Tomonaga Luttinger liquid,Calorimetry,Long range orders,Linear temperature dependence,Model materials,S=1/2 two-leg spin ladder,Liquids,Quantum phase transitions
Original languageEnglish
JournalPhysical Review Letters
Issue number13
Pages (from-to)137207
StatePublished - 2010
Externally publishedYes
CitationsWeb of Science® Times Cited: 63
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ID: 6374955