The Raman response of the metallic glass Ni67Zr33 is measured as a function of polarization and temperature and analyzed theoretically. Unexpectedly, the intensity in the range up to 300cm-1 increases upon cooling, which is counterintuitive when the response originates from vibrations alone as in insulators. The increase finds a natural explanation if the conduction electrons are assumed to scatter on localized vibrations with a scattering probability proportional to the Debye-Waller factor. None of our assumptions is material specific, and the results are expected to be relevant for disordered systems in general.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - szept. 6 2011|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics