Can Inelastic Processes Mimic a Pseudogap in Photoemission Experiments?

Robert Joynt

Chinese Journal of Physics

38卷2S期（2000 / 04 / 01）

295 - 299

英文

In a photoemission experiment, the ejected electron generates heat by ohmic losses in the semi-infinite solid left behind. This inelastic scattering of the electron causes a downward shift in observed spectra. If this effect is large enough, it can mimic a pseudogap. I point out that, counterintuitively, this effect is most pronounced in poorly conducting metals: in good metals the electron's field is screened out. A brief introduction to the calculation method is presented and I survey various materials for which this loss effect may have to be included in analysis of experimental data.