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

Research output: Contribution to journalJournal article

Published

Article number155314
Journal publication date15/10/2001
JournalPhysical Review B
Journal number15
Volume64
Number of pages12
Pages-
Original languageEnglish

Abstract

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 wave functions. 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.