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Correlation effects in partially ionized mass asymmetric electron-hole plasmas

V. S. Filinov·H. Fehske·M. Bonitz·V. E. Fortov·P. Levashov
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Abstract

The effects of strong Coulomb correlations in dense three-dimensional electron-hole plasmas are studied by means of unbiased direct path integral Monte Carlo simulations. The formation and dissociation of bound states, such as excitons and bi-excitons is analyzed and the density-temperature region of their appearance is identified. At high density, the Mott transition to the fully ionized metallic state (electron-hole liquid) is detected. Particular attention is paid to the influence of the hole to electron mass ratio $M$ on the properties of the plasma. Above a critical value of about M=80 formation of a hole Coulomb crystal was recently verified [Phys. Rev. Lett. {\bf 95}, 235006 (2005)] which is supported by additional results. Results are related to the excitonic phase diagram of intermediate valent Tm[Se,Te], where large values of $M$ have been observed experimentally.

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V. S. Filinov, H. Fehske, M. Bonitz, V. E. Fortov, P. Levashov. 2007-02-02. Correlation effects in partially ionized mass asymmetric electron-hole plasmas. https://doi.org/10.1103/physreve.75.036401

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