Anisotropic electrodynamics of low dimensional metals: Optical studies of (TMTSF) 2 ClO 4

W. Henderson, V. Vescoli, P. Tran, L. Degiorgi () and G. Grüner

The European Physical Journal B: Condensed Matter and Complex Systems, 1999, vol. 11, issue 3, 365-368

Abstract: Optical experiments are reported for the metallic state of the linear chain compound (TMTSF) 2 ClO 4 . For the electric field polarized both along the highly (a) and intermediately (b′) conducting directions, a zero energy (ZE) mode and a finite energy mode (FE) are observed. The large anisotropy in the spectral weight of the FE mode is consistent with the band structure, however the spectral weight of the ZE mode is surprisingly isotropic. In the least conducting (c * ) direction, the low frequency optical conductivity along with the dc conductivity indicate the presence of a (small) Drude component only at temperatures below 10 K. These observations provide evidence for a correlation induced semimetallic state, with a 3D to 2D crossover with increasing temperature. Copyright Società Italiana di Fisica, Springer-Verlag 1999

Keywords: PACS. 78.20.-e Optical properties of bulk materials and thin films; 71.10.Pm Fermions in reduced dimensions (anyons; composite fermions; Luttinger liquid; etc.) (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1007/s100510050946

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