학술논문
Influence of the Wavefunction Distribution on Exciton Dissociation in Electric Field.
Document Type
Article
Author
Source
Subject
*DISSOCIATION (Chemistry)
*QUANTUM numbers
*ELECTRIC potential
*EXCITON theory
*WAVE functions
*ELECTRIC fields
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Language
ISSN
1063-7834
Abstract
We show that the dissociation threshold of an exciton, a bound electron-hole pair, by an electric field is mainly determined by its energy: as expected, the dissociation voltage decreases with increasing exciton energy. However, within the multiplet of states belonging to a particular principal quantum number n, the dissociation voltage rises with increasing state energy, in contrast to the expectations based on energy arguments. This behavior is demonstrated for the yellow exciton states of Cu2O and is attributed to the distribution of the wavefunction in the potential landscape, where the lower (higher) lying state in the multiplet is shifted away (towards) the tunnel barrier. [ABSTRACT FROM AUTHOR]