Specific heat studies of the spin-peierls transition |
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| Authors: | T Wei AJ Heeger MB Salamon GE Delker |
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| Institution: | Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA 19174, U.S.A.;Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, IL 61801, U.S.A.;Department of Chemistry and Materials Research Laboratory, University of Illinois, Urbana, IL 61801, U.S.A. |
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| Abstract: | An experimental study is presented of the specific heat of the spin—Peierls systems TTF-TBT(M), M = Cu, Au. The linear term, γT, expected for the uniform one-dimensional antiferromagnet at low temperatures is observed above the Peierls transition. Specific heat anomalies associated with the transition are found at Tp(Cu) = 12.4K and Tp(Au) = 2.06K. The transition for TTF-BDT(Cu) is mean-field like; whereas the transition for TTF-BDT(Au) is broadened by one-dimensional fluctuation effects. |
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