Raman scattering experiments from acoustic phonons in Fibonacci metallic Nb-Cu superlattices were performed.The main features of the experimental results show that the Raman spectrum is dominated by triplet peaks whic...Raman scattering experiments from acoustic phonons in Fibonacci metallic Nb-Cu superlattices were performed.The main features of the experimental results show that the Raman spectrum is dominated by triplet peaks which originate from the density of states of longitudinal-acoustic(LA)phonons in the subbands of phonon dispersion.The expected rich structure of gaps in the phonon spectrum has been labeled by strongest diffraction wave vector factor nτP.展开更多
基金Project supported by the National Science Foundation of China.
文摘Raman scattering experiments from acoustic phonons in Fibonacci metallic Nb-Cu superlattices were performed.The main features of the experimental results show that the Raman spectrum is dominated by triplet peaks which originate from the density of states of longitudinal-acoustic(LA)phonons in the subbands of phonon dispersion.The expected rich structure of gaps in the phonon spectrum has been labeled by strongest diffraction wave vector factor nτP.