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Chen Zhiyu1, Wang Ruifeng2, 3, Wang Guoyu2, 3, Zhou Xiaoyuan4, Wang Zhengshang1, Yin Cong1, Hu Qing1, Zhou Binqiang5, Tang Jun1, 6, ‡, Ang Ran1, 6, †
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(color online) Temperature-dependent (a) total thermal conductivity κ and (b) lattice thermal conductivity
κ
l
for all samples. (c) The
κ
l
as a function of 1000/T for pristine SnTe. The solid line represents linear fitting, and deviation of thermal conductivity indicates the contribution of bipolar diffusion
κ
bip
. Inset: the
κ
bip
as a function of Zn content x. (d) Room temperature
κ
l
as a function of x. The solid line corresponds to the prediction of
κ
l
according to the Debye–Callaway model. (e) and (f) SEM images for the samples with x=0.02 and 0.04, respectively.
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