Electronic structures of a charge-density-wave CDW system CeTe_2-xSb_x (x=0, 0.05) have been investigated by employing angle-resolved photoemission spectroscopy (ARPES). The observed Fermi surface (FS) agrees very well with the calculated FS for the undistorted CeTe_2 both in shapes and sizes. The metallic states crossing the Fermi level(E_F) are observed in ARPES. The carriers near E_F have mainly the Te(1) 5p character, with the negligible contribution from Ce 4f states to the CDW formation. The supercell (shadow) bands and the corresponding very weak FS's are found to arise from band-folding due to the interaction with Ce-Te(2) layers. This work shows that the origin of the CDW formation in CeTe_2 is the FS nesting and that the CDW modulation vector is along Gamma-X (Q_CDW ~ X)
@article{arxiv.1109.0380,
title = {Fermi Surface Reconstruction in CeTe2 Induced by Charge Density Wave: ARPES Study},
author = {J. -S. Kang and D. H. Kim and H. J. Lee and J. H. Hwang and Han-Koo Lee and H. -D. Kim and B. H. Min and K. E. Lee and Y. S. Kwon and J. W. Kim and Kyoo Kim and B. H. Kim and B. I. Min},
journal= {arXiv preprint arXiv:1109.0380},
year = {2011}
}