Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of the electronic structure from the insulator to the
  superconductor in Bi2Sr2-xLax(Ca,Y)Cu2O8+d   La-doped and Y-doped Bi2Sr2CaCu2O8+d (Bi2212) compounds
Bi2Sr2-xLax(Ca,Y)Cu2O8+d, which range from the insulator to the deeply
underdoped superconductor, have been studied by angle-resolved photoemission
spectroscopy. We have observed that the lower Hubbard band (LHB) of the parent
insulator is gradually shifted upward with doping without significantly
changing the band dispersions, which implies a downward shift of the chemical
potential with hole doping. This behaviour is analogous to Bi2Sr2-xLaxCuO6+d
(Bi2201) and Ca2-xNaxCuO2Cl2 (Na-CCOC) but is different from La2-xSrxCuO4
(LSCO), where the LHB stays well below the chemical potential and does not move
while its intensity quickly diminishes in the underdoped region.

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The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
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The categories of this paper are: eess
1
The categories of this paper are: cs
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph