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Chemical pressure and hidden one-dimensional behavior in rare-earth tri-telluride charge-density wave compounds

Authors
Sacchetti, A.
Degiorgi, L.
Ru, N.
Fisher, I. R.
Published in Physical Review. B, Condensed Matter. 2006, vol. 74, no. 12
Abstract We report on the first optical measurements of the rare-earth tri-telluride charge-density wave systems. Our data, collected over an extremely broad spectral range, allow us to observe both the Drude component and the single-particle peak, ascribed to the contributions due to the free charge carriers and to the charge-density wave gap excitation, respectively. The data analysis displays a diminishing impact of the charge-density wave condensate on the electronic properties with decreasing lattice constant across the rare-earth series. We propose a possible mechanism describing this behavior and we suggest the presence of a one-dimensional character in these two-dimensional compounds. We also envisage that interactions and umklapp processes might play a relevant role in the formation of the charge-density wave state in these compounds.
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SACCHETTI, A. et al. Chemical pressure and hidden one-dimensional behavior in rare-earth tri-telluride charge-density wave compounds. In: Physical Review. B, Condensed Matter, 2006, vol. 74, n° 12. https://archive-ouverte.unige.ch/unige:36077

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Deposited on : 2014-04-28

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