Yb-Sn-Te ternary system

Aliev, O. M.; Akhmedova, N. R.; Рагимова, В. М.; Аждарова, Д. С.; Bakhshalieva, E. A.

doi:10.1134/s0036023609110230

Cited by 3 publications

(1 citation statement)

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“…Owing to a good solubility level of Yb in SnTe, we have tested effect of Yb doping on thermoelectric properties of SnTe. 30,31 Therefore, we report experimental observation of a three-time increment in S 2 σ for SnTe with Yb doping (only 5%), which provides efficient degeneracy of the valence bands VB1 and VB2 as supported by our first principle calculations. Further, the first principles calculation shows that due to heavy atomic mass (~173.04 g mol -1 ) and strong spin-orbit coupling, Yb doping (~ 5%) can converge the two valence bands more effectively than Mn at the same doping level.…”

Section: Introductionsupporting

confidence: 64%

Rare earth doping and effective band-convergence in SnTe for improved thermoelectric performance

Acharya

Dey

Maitra

et al. 2018

Applied Physics Letters

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Thermoelectric performance of SnTe has been found to enhance with isovalent doping of alkaline and transition metal elements where most of these elements have solubility of less than 13%. We propose a strategy of doping rare earth element Yb to enhance the thermoelectric performance of SnTe. With heavy atomic mass and strong spin-orbit coupling, even the mild doping of Yb (~ 5%) is enough to create a degeneracy via band-convergence which enhances the density of states near Fermi level and improve overall performance. Our transport data and firstprinciples calculations corroborate that nearly 5% Yb is an efficient dopant to achieve thermoelectric response which is equivalent to 9% of Mn doping. The results are useful for understanding the environment-friendly thermoelectric SnTe.

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Section: Introductionsupporting

confidence: 64%