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Synchrotron radiation measurements and calculation of core to conduction level transitions in lead chalcogenides |
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| Authors: | G. Martinez M. Schlüter Marvin L. Cohen R. Pinchaux P. Thiry D. Dagneaux Y. Petroff |
| Affiliation: | Department of Physics, University of California and Inorganic Materials Research Division, Lawrence Berkeley Laboratory, Barkeley, California 94720, U.S.A.;Laboratoire de Physique des Solides, University of Paris VI and L.U.R.E. Orsay, France |
| Abstract: | New high resolution reflectivity measurements on PbSe and PbTe using synchrotron radiation (18–26 eV) are studied using an OPW formalism based on recent improved EPM band structure models to determine the angular momentum character of the final conduction band states. Detailed analysis reveals that the reflectivity threshold is shifted to lower energies by 0.8 eV compared to results derived from photoemission and low energy reflectivity data. Electron-hole interactions are suggested as a possible explanation for this shift. |
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