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Disorder Quenching of the Charge Density Wave in ZrTe_{3}
Moritz Hoesch1,2,3, Liam Gannon1,4, Kenya Shimada2
1Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom.
Abstract:
The charge density wave (CDW) in ZrTe_{3} is quenched in samples with a small amount of Te isoelectronically substituted by Se. Using angle-resolved photoemission spectroscopy we observe subtle changes in the electronic band dispersions and Fermi surfaces upon Se substitution. The scattering rates are substantially increased, in particular for the large three-dimensional Fermi surface sheet. The quasi-one-dimensional band is unaffected by the substitution and still shows a gap at low temperature, which starts to open from room temperature. Long-range order is, however, absent in the electronic states as in the periodic lattice distortion. The competition between superconductivity and the CDW is thus linked to the suppression of long-range order of the CDW.
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