Time-accurate Measurements Research Articles

Electronic structure of GdP as determined from optical data

The growth of large single crystals of GdP of various stoichiometry has permitted for the first time accurate measurements of the reflectivity for photon energies from 0.03 to 12 eV. By means of a Kramers-Kronig analysis it was possible to separate intra- and interband transitions. The latter ones have provided valuable information about the structure of the 5 d conduction band, its crystal field splitting and the position in energy of the 4 f levels of Gd 3+. The variation of the plasma resonance with deviations from stoichio-iometry does not exclude a semimetallic behavior of GdP.