Many-body interaction in semiconductors probed with two-dimensional Fourier spectroscopy

    Authors

    M. Erementchouk; M. N. Leuenberger;L. J. Sham

    Comments

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    Abbreviated Journal Title

    Phys. Rev. B

    Keywords

    DYNAMICS; Physics, Condensed Matter

    Abstract

    A particular difficulty in studying many-body interactions in a solid is the absence of an experimental technique that can directly probe their key characteristics. We show that two-dimensional (2D) Fourier spectroscopy provides an efficient tool for the measurement of critical parameters describing the effect of many-body interactions on the optical response of semiconductors. We develop the basic microscopic theory of 2D Fourier spectroscopy of semiconductors in the framework of the three-band model (heavy holes, light holes, and electrons). The theory includes many-body correlations nonperturbatively and can be generalized straightforwardly in order to describe 2D Fourier spectra obtained in atomic physics. We establish a relation between the 2D Fourier spectrum and the many-body correlations. It is shown, in particular, that 2D Fourier spectroscopy provides a principal possibility to establish experimentally the origin of the fast decay of the memory term describing the Coulomb interaction between heavy- and light-hole excitons. The theory is applied to an analysis of the available experimental data. Experiments providing more detailed information are suggested.

    Journal Title

    Physical Review B

    Volume

    76

    Issue/Number

    11

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    5

    WOS Identifier

    WOS:000249786400061

    ISSN

    1098-0121

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