We have carried out neutron scattering experiments for liquid Te 50Se50 at 700K (semiconducting regime), 900K (transition regime) and 1100K (metallic regime). The quasielastic scattering peak is comparatively narrow at the peak positions of S(Q). A remarkable increase in the peak width is observed near the first minimum of S(Q), when the semiconductor-to-metal transition occurs. Since the first peak of S(Q) in this system proves to mainly reflect the inter-chain correlation and the second peak to the intra-chain correlation, the observed broadening may suggest frequent bond-switching between the chains in the metallic regime.
ASJC Scopus subject areas
- Physics and Astronomy(all)