Fluctuations and order in a one-dimensional system. A spectroscopical study of the Peierls transition in Pt·3(O)
- 1 July 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 12 (1), 219-225
- https://doi.org/10.1103/physrevb.12.219
Abstract
Using optical spectroscopy in the energy range 1 meV-6 eV as a tool we have studied the Peierls transition in Pt ·3(O). We find a pseudogap at 0.2 eV at room temperature which transforms into a real gap as without significantly changing the gap energy. From this we infer that although no long-range order exists at room temperature the rms order parameter has already reached its zero temperature value. At we find a strong structure in at which is assigned to an oscillation of the pinned charge-density wave (CDW). A simple phenomenological model allows us to estimate the contribution of the thermally unpinned CDW to the dc conductivity at . We conclude that the contribution is 50% or less of the total conductivity.
Keywords
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