Calculated and measured reflectivity of ZnGe<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">P</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>

Carmen Varea de Alvarez; Marvin L. Cohen; S. E. Kohn; Y. Petroff; Y. R. Shen

doi:10.1103/PhysRevB.10.5175

Calculated and measured reflectivity of ZnGe $P_{2}$

Carmen Varea de Alvarez, Marvin L. Cohen, S. E. Kohn, Y. Petroff, and Y. R. Shen

Phys. Rev. B 10, 5175 – Published 15 December 1974

Abstract

Reflectivity spectra of the chalcopyrite ternary compound ZnGe $P_{2}$ are studied experimentally and theoretically. The measurements of the reflectivity in both the complete parallel and perpendicular polarizations are made at 5°K. A full zone energy-band structure, the reflectivity and imaginary part of the frequency-dependent dielectric function are calculated using the empirical pseudopotential method. Comparison is made with the measured reflectivity and modulated reflectivity and prominent features in the experimental spectra are identified and associated with interband transitions. In addition, spin-orbit interactions are included at a few points of the Brillouin zone.

Received 24 June 1974

DOI:https://doi.org/10.1103/PhysRevB.10.5175

Authors & Affiliations

Carmen Varea de Alvarez^*,†, Marvin L. Cohen^*, S. E. Kohn, Y. Petroff, and Y. R. Shen

Department of Physics, University of California, Berkeley, California 94720
Inorganic Materials Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720

^*Supported in part by the National Science Foundation Grant No. GH 35688.
^†Present address: Plinio 354, Mexico 5, D. F., Mexico.

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Vol. 10, Iss. 12 — 15 December 1974

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