Using high-resolution temperature-dependent (20-400 K) valence-band photoemission spectroscopy, we study the nature of electron-phonon coupling in polycrystalline gold. The valence band shows systematic broadening for increasing temperatures which is well-reproduced by a Gaussian broadening of the 20 K spectrum. It depends linearly on temperature and is found to be excessive (∼9 (Formula presented) T). The results suggest the existence of anharmonic lattice vibrations and a quadratic electron-phonon coupling, similar to the case of aluminum 2p core levels.
|頁（從 - 到）||5574-5577|
|期刊||Physical Review B - Condensed Matter and Materials Physics|
|出版狀態||Published - 1997 一月 1|
All Science Journal Classification (ASJC) codes