Lattice thermal conductivity of topological insulator BiSe nanocrystals: comparison from theoretical and experimental.

Lattice thermal conductivity () calculations using the Wiedemann-Franz law involve electrical conductivity, which introduces an error in the actual value of . We have adopted a non-contact measurement technique and calculated the from the temperature and power-dependent Raman spectra of the BiSe nanocrystals with truncated hexagon plate morphology stabilized in a hexagonal crystal structure. The hexagon plates of BiSe are 37 to 55 nm thick with lateral dimensions around 550 nm.