Anisotropic in-plane thermal conductivity of black phosphorus
MAs a layered semiconductor, black phosphorous exhibits strong anisotropy in its thermal conductivity along the zigzag (ZZ) and armchair (AC) directions.
Discovered a factor of two difference in thermal conductivity along two different directions in few-layer black phosphorous (BP).
Significance and Impact
This anisotropy could boost energy-efficient transistor and thermoelectric device design.
- Thermal conductivity of BP nanoribbons was measured as a function of temperature and ribbon orientation and sizes
- Strong anisotropy in thermal conductivity was attributed mainly to phonon dispersion, which is orientation-dependent
- This opens opportunities to design microelectronic devices with different lattice orientations for cooling & operating microchips