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

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

2009-02-28

arxiv.org/abs/0903.0095v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 7 figures

Scientific paper

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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