Fermi Surface Evolution Across Multiple Charge Density Wave Transitions in ErTe3

Details Fermi Surface Evolution Across Multiple Charge Density Wave Transitions in ErTe3 Fermi Surface Evolution Across Multiple Charge Density Wave Transitions in ErTe3

2008-09-17

arxiv.org/abs/0809.2832v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

The Fermi surface (FS) of ErTe3 is investigated using angle-resolved photoemission spectroscopy (ARPES). Low temperature measurements reveal two incommensurate charge density wave (CDW) gaps created by perpendicular FS nesting vectors. A large Delta_1 = 175 meV gap arising from a CDW with c* - q_CDW1 ~ 0.70(0) c* is in good agreement with the expected value. A second, smaller Delta_2 = 50 meV gap is due to a second CDW with a* - q_CDW2 ~ 0.68(5) a*. The temperature dependence of the FS, the two gaps and possible interaction between the CDWs are examined.

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