Correlation-function spectroscopy of inelastic lifetime in heavily doped GaAs heterostructures

Details Correlation-function spectroscopy of inelastic lifetime in heavily doped GaAs heterostructures Correlation-function spectroscopy of inelastic lifetime in heavily doped GaAs heterostructures

2001-05-02

arxiv.org/abs/cond-mat/0105025v1

Phys. Rev. B 64, 155314 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

41 pages, 14 figures

Scientific paper

10.1103/PhysRevB.64.155314

Measurements of resonant tunneling through a localized impurity state are used to probe fluctuations in the local density of states of heavily doped GaAs. The measured differential conductance is analyzed in terms of correlation functions with respect to voltage. A qualitative picture based on the scaling theory of Thouless is developed to relate the observed fluctuations to the statistics of single particle wavefunctions. In a quantitative theory correlation functions are calculated. By comparing the experimental and theoretical correlation functions the effective dimensionality of the emitter is analyzed and the dependence of the inelastic lifetime on energy is extracted.

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