On the additivity of generation-recombination spectra. Part 1: Conduction band with two centres

F.N. Hooge

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

If a semiconductor contains two generation–recombination centres, A and B, the noise spectrum either is the simple addition of the two characteristic A and B spectra, or a Lorentzian spectrum with a relaxation time t given by t-1=tA-1+tB-1. The latter situation is called mixing. We can derive the mathematical criterion that decides whether addition or mixing occurs: Addition if na*,nb*. Mixing if na*,nb*. The number n is the number of free electrons in the conduction band. The number a* either is a, the number of occupied A states, or the number of empty states, (A–a), depending on which is smaller. A qualitative physical interpretation is given of the precise mathematical condition.
Original languageEnglish
Pages (from-to)238-249
Number of pages12
JournalPhysica B: Condensed Matter
Volume31
Issue number3-4
DOIs
Publication statusPublished - 2002

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