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arXiv · 0903.0095

Splitting in the Fermi surface of ZrTe_3: a surface charge density wave system

Moritz Hoesch·Xiaoyu Cui·Kenya Shimada·Corsin Battaglia·Shin-ichi Fujimori·Helmuth Berger
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Abstract

The electronic band structure and Fermi surface of ZrTe_3 was precisely determined by linearly polarized angle-resolved photoelectron spectroscopy. Several bands and a large part of the Fermi surface are found to be split by 100-200 meV into two parallel dispersions. Band structure calculations reveal that the splitting is due to a change of crystal structure near the surface. The agreement between calculation and experiment is enhanced by including the spin-orbit potential in the calculations, but the spin-orbit energy does not lead to a splitting of the bands. The dispersion of the highly nested small electron pocket that gives rise to the charge density wave is traceable even in the low-temperature gapped state, thus implying that the finite correlation length of the long-wavelength modulation leads to a smearing of the band back-folding.

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Moritz Hoesch, Xiaoyu Cui, Kenya Shimada, Corsin Battaglia, Shin-ichi Fujimori, Helmuth Berger. 2009-02-28. Splitting in the Fermi surface of ZrTe_3: a surface charge density wave system. https://doi.org/10.1103/physrevb.80.075423

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