Large wave-vector phonon modes in silicon nanomembranes
Tuesday, July 16, 2013 - 10:30
in Physics & Chemistry
(Phys.org) —Modified large wave-vector phonons in semiconductor membranes via hard X-ray thermal diffuse scattering (TDS) were observed that provide new insight into the fundamental thermal and electronic properties of nanomaterials. The observation of X-ray TDS from suspended silicon membranes with thicknesses below 10 nm vastly expands the range of materials for which these vibrational modes can be studied. Understanding phonon confinement in nanostructures will enable control of thermal, optical, and electrical transport properties.