Phonon Conductance of Potassium- and Sodium-Doped Transpolyacetylene Chain

Figure 3

(a) Evolution of the absolute values of the complex phase factors 𝑍_𝜈, as a function of the dimensionless frequency Ω, for the above 𝛾₁ and 𝛾₂ values. (b) Group velocity 𝑣_𝑔 for the different phonon eigenmodes as a function of the dimensionless frequency Ω, for the specific case of 𝛾₁=𝑘₁/𝑘=0.5 and 𝛾₂=𝑘₂/𝑘=0.8 of the undoped transpolyacetylene chain.

(a)

(b)