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Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 31: Correlated Electrons - Low-dimensional Materials I

TT 31.5: Talk

Tuesday, March 8, 2005, 15:00–15:15, TU H2053

Strong evidence for Luttinger Liquid behaviour in quasi-one-dimensional Lithium purple bronze — •J. Hager and R. Matzdorf — FB 18, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel

We have measured the density of states at energies near the Fermi energy єF using scanning tunneling spectroscopy on cleaved Li0.9Mo6O17 samples. In literature the discussion about the electronic structure, especially a phase transition at T=24K remains controversial. Localization effects, charge density wave and spin density wave transitions, as well as a Luttinger Liquid scenario are used to explain experiments. Our dI/dV measurements at 5K show strong depression of the dI/dV signal at єF. Our experimental spectra near the Fermi energy can be explained excellently by Luttinger Liquid theory at low and ambient temperatures. Our data excludes current zero bias anomaly theories for explanation, which would predict a similar behaviour.

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