Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-01-16
Phys. Rev. B75, 205133 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1103/PhysRevB.75.205133
The La and Ce di-tellurides LaTe$_2$ and CeTe$_2$ are deep in the charge-density-wave (CDW) ground state even at 300 K. We have collected their electrodynamic response over a broad spectral range from the far infrared up to the ultraviolet. We establish the energy scale of the single particle excitation across the CDW gap. Moreover, we find that the CDW collective state gaps a very large portion of the Fermi surface. Similarly to the related rare earth tri-tellurides, we envisage that interactions and Umklapp processes play a role in the onset of the CDW broken symmetry ground state.
Degiorgi Leonardo
Fisher Ian R.
Lavagnini Michela
Sacchetti Andrea
Shin K. Y.
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