Fig. 5: Electrical transport properties of Bi2Te3-family crystals.

Room-temperature a carrier concentration (nH), b electrical conductivity (σ), and c Seebeck coefficients (S) of Bi2(Te1-xSex)3 bulk crystals. Room-temperature d nH, e σ, and f S of (Bi1-ySby)2Te3 bulk crystals.