Electron and phonon energy spectra in a three-dimensional regimented quantum dot superlattice

Phonons in Slow Motion: Dispersion Relations in Ultrathin Si Membranes

“…Recent experimental results [6][7][8] have suggested that slowing down phonons may have beneficial effects to improve the efficiency of thermoelectric materials, supporting earlier theoretical predictions [9][10][11][12] . On the other hand, as channel widths scale well below 20 nm, heat dissipation and phonon-limited electron mobility are major obstacles towards increasing device performance 13 .…”

Constitutive equations for heat conduction in nanosystems and nonequilibrium processes: an overview

“…Some of the most well-known nanocomposites are superlattices [93], in which the particles are distributed in a spatially ordered pattern, and the nanoparticles may be so small as to behave as quantum dots [94][95][96][97][98]. In metals and semiconductors, where electrons and holes also contribute to thermal conductivity, superlattices may be designed in such a way to strongly reduce phonon transport without reducing electron transport, because of the widely different values of phonon and electron wavelengths.…”

Reduction of acoustic-phonon deformation potential in one-dimensional array of Si quantum dot interconnected with tunnel oxides

“…Alteration of the phonon despersion relations in various nanostructures have also been examined, and many interesting phenomena in electron transport and the lattice thermal conductivity have been predicted. 25,26 Such phonon engineering in Si and SiO 2 systems could be one of the most important topics in future Si-based nanoelectronics.…”