Doping Dependent Density of States and Pseudogap Behavior in La2-xSrxCuO4

Details Doping Dependent Density of States and Pseudogap Behavior in La2-xSrxCuO4 Doping Dependent Density of States and Pseudogap Behavior in La2-xSrxCuO4

1998-06-29

arxiv.org/abs/cond-mat/9806341v2

Phys. Rev. Lett. 81, 2124 (1998)

Physics

Condensed Matter

Superconductivity

4 pages, 3 EPS figures, uses RevTex; few references have been updated

Scientific paper

10.1103/PhysRevLett.81.2124

We have made a high-resolution photoemission study of La2-xSrxCuO4 in a wide hole concentration (x) range from a heavily overdoped metal to an undoped insulator. As x decreases, the spectral density of states at the chemical potential (\mu) is suppressed with an x-dependence similar to the suppression of the electronic specific heat coefficient. In the underdoped region, the spectra show a pseudogap structure on the energy scale of 0.1 eV. The width of the pseudogap increases with decreasing x following the x-dependence of the characteristic temperatures of the magnetic susceptibility and the Hall coefficient.

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