Density of states in La2CuO4+y

A. Gold and A. Ghazali
Phys. Rev. B 43, 12952 – Published 1 June 1991
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Abstract

We describe the excess holes in the CuO2 sheets of La2CuO4+y as a two-dimensional hole gas in a quantum well in the presence of negatively charged impurities. We calculate the density of states with a multiple-scattering approach. We discuss the broadening of the impurity band with increasing y, which corresponds to an increasing hole concentration. The spectral density, which describes for vanishing hole concentration the Fourier transform of the squared wave function, is evaluated. We compare our results with recent measurements of La2CuO4+y with y<0.007.

  • Received 1 November 1990

DOI:https://doi.org/10.1103/PhysRevB.43.12952

©1991 American Physical Society

Authors & Affiliations

A. Gold

  • Physik Department, Technische Universität München, 8046 Garching, Germany

A. Ghazali

  • Groupe de Physique des Solides, Université de Paris VI & VII, 75251 Paris, France

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Vol. 43, Iss. 16 — 1 June 1991

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