Suppressing phonon transport in nanowires: a simple model for phonon-surface roughness interaction
arXiv:1707.07732 · doi:10.1103/PhysRevB.96.075403
Abstract
Suppressing phonon propagation in nanowires is an essential goal towards achieving efficient thermoelectric devices. Recent experiments have shown unambiguously that surface roughness is a key factor that can reduce the thermal conductivity well below the Casimir limit in thin crystalline silicon nanowires. We use insights gained from the experimental studies to construct a simple analytically tractable model of the phonon-surface roughness interaction that provides a better theoretical understanding of the effects of surface roughness on the thermal conductivity, which could potentially help in designing better thermoelectric devices.
arXiv comment7 pages, 3 figures; accepted for publication in Phys. Rev. B
References in corpus (21)
- Phonon-glass electron-crystal thermoelectric clathrates: Experiments and theory
- Calculation of nanowire thermal conductivity using complete phonon dispersion relations
- Thermoelectric effect in molecular electronics
- Impact of Phonon Surface Roughness Scattering on Thermal Conductivity of Thin Si Nanowires
- Thermoelectric energy harvesting with quantum dots
- Most efficient quantum thermoelectric at finite power output
- Giant thermopower and figure of merit in single-molecule devices
- Thermopower of Single-Molecule Devices
- Heat conduction in molecular transport junctions
- Optimal thermoelectric figure of merit of a molecular junction
- Thermoelectric efficiency at maximum power in low-dimensional systems
- Increasing thermoelectric performance using coherent transport
- Three-terminal thermoelectric transport through a molecular junction
- Powerful and efficient energy harvester with resonant-tunneling quantum dots
- Effect of phonon scattering by surface roughness on the universal thermal conductance
- Low-temperature heat transfer in nanowires
- Surface roughness and thermal conductivity of semiconductor nanowires: going below the Casimir limit
- Phonon Heat Conduction in Corrugated Silicon Nanowires Below the Casimir Limit
- Non-linear thermoelectric transport: A class of nano-devices for high efficiency and large power output
- Thermopower of a Quantum Dot in a Coherent Region
- Gate-modulated thermopower in disordered nanowires: I. Low temperature coherent regime