Line Plot from Scientific Research

Left: band structure for ν = Z in a two-band, light–heavy scenario where the two bands feature distinct scattering rates (carrier lifetimes). The hole band has a shorter carrier lifetime, illustrated by spectral broadening of the states ( τ ∝ 1/Δ E ). Right: computed Seebeck coefficient in the light–heavy scenario with {m}{h}* = 150 {m}{e}* , τ e = 6 τ h . The lifetime asymmetry drastically modifies the Seebeck coefficient, which becomes fully negative across the integer filling.

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