Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi Surface Reconstruction in CeTe2 Induced by Charge Density Wave:
  ARPES Study   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)

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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: math
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
9
The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: hep-ph