A clear trend of initial increase followed by decrease can be observed, with the maximum PF reaching ≈ 1.45 W cm −1 K −2 at 473 K along the parallel direction and ≈ 3.51W cm −1 K −2 at 373 K along perpendicular direction.
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Realizing High Performance in P-Type SnBi<sub>2</sub>Te<sub>4</sub> Through Synergistically Improving Effective Mass and Suppressing Bipolar Thermal Conductivity.
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