Hole contribution to the elastic constants of SnTe

Seddon, Toby; Gupta, Surendra; Saunders, G. A.

doi:10.1016/0038-1098(76)91701-4

Cited by 37 publications

(7 citation statements)

References 12 publications

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“…The values obtained are in agreement with literature values reported for PbTe, v s = 1830(30) m s −1 63, and SnTe, v s = 1750(50) m s −1 , obtained from the elastic constants in Ref. 64.…”

Section: Resultssupporting

confidence: 92%

Lattice dynamics and structure of GeTe, SnTe and PbTe

Pereira

Sergueev

Gorsse

et al. 2012

Physica Status Solidi (b)

176

105

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The lattice dynamics in the IV-VI compounds GeTe, SnTe and PbTe were studied by 125 Te and 119 Sn nuclear inelastic scattering and the obtained partial density of phonon states were compared with published theoretical calculations. The phase purity and structure were characterized by high energy X-ray diffraction. The effect of the atomic arrangement, rhombo-hedral for GeTe and cubic for SnTe and PbTe, is visible in the density of phonon states. Vibrational properties are found to be in good agreement with available calculated data and the softer character of the NaCl-type structures in comparison with the rhombohedral GeTe is confirmed.

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Section: Resultssupporting

confidence: 92%

Lattice dynamics and structure of GeTe, SnTe and PbTe

Pereira

Sergueev

Gorsse

et al. 2012

Physica Status Solidi (b)

176

105

View full text Add to dashboard Cite

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“…Here, the Lorenz number is obtained based on the two band model and the calculated details is given in the Supporting Information (SI). − Compared with pristine SnTe, most Pd doped samples show even higher electronic thermal conductivity in Figure b. Therefore, the decrease of κ total mostly arise from a decrease of κ L .…”

Section: Resultsmentioning

confidence: 98%

Enhancement of Thermoelectric Properties in Pd–In Co-Doped SnTe and Its Phase Transition Behavior

Lei

Zhou

et al. 2019

ACS Appl. Mater. Interfaces

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SnTe has attracted more and more attention due to the similar band and crystal structure with high performance thermoelectric materials PbTe. Here, we introduced Pd into SnTe and the valence band convergence was confirmed by first-principles calculation. In the experimental process, we found that Pd-doped SnTe exhibit a reduced thermal conductivity because of softening chemical bonds and grain refining effects. To further improve the thermoelectric performance, Pd–In codoped SnTe samples were prepared, and the abnormal change of thermal conductivity was observed. The results of synchrotron powder diffraction suggest that the local phase transition (local structural distortions) near 400 K results in the first turn on thermal conductivity. Similarly, the second local phase transition in near 600 K observed by neutron powder diffraction lead to a decrease thermal conductivity of the sample. Finally, a peak thermoelectric figure of merit (ZT) ≈ 1.51 has been obtained in Sn0.98Pd0.025In0.025Te at 800 K.

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“…For the Ag and Sb atoms, in addition to filling the Sn vacancies, it will replace the Sn atom. , However, if we carefully observe Figure a, we should note that the reduction effect for the total thermal conductivity due to the doping MgAgSb is weakened when the measuring temperature is beyond 650 K. In fact, this trend of total thermal conductivity is closely related to the change of lattice thermal conductivity κ L because the electron thermal conductivity κ e is nearly unchanged over the measuring temperature. κ L and κ e could be obtained from the total lattice thermal conductivity based on a two-band-model. ,− Figure c shows the lattice thermal conductivity of Sn 1.03 Te- x %MgAgSb as a function of the measuring temperature. Compared with the pristine SnTe, the MgAgSb-doping SnTe samples even show the larger value of the lattice thermal conductivity at high temperature (≥650 K).…”

Section: Resultsmentioning

confidence: 99%

High Thermoelectric Performance of SnTe by the Synergistic Effect of Alloy Nanoparticles with Elemental Elements

Wang

Lei

et al. 2019

ACS Appl. Energy Mater.

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The introduction of special alloy nanoparticles and elemental elements in the matrix can synergistically optimize the thermoelectric properties of SnTe. Here, MgAgSb alloy nanoparticles and 0.5 mol % In are co-doped into SnTe to optimize electrical and thermal properties, which finally make the thermoelectric performance greatly improved. The improvement of Seebeck coefficient results from the valence band convergence because of the presence of Ag, Mg, and Sb atoms and a resonant state generated by doping In element. In addition, the carrier mobility is enhanced owing to the decrease of Sn vacancies caused by the doping. A high power factor (17.67 μW cm −1 K −2 ) can be obtained in Sn 1.025 In 0.005 Te-3%MgAgSb sample at 835 K. Doping multielement alloy could also effectively improve the thermal properties by scattering phonons in each frequency band, which cannot be realized merely by doping single element. This strong phonon scattering is derived from point defects and particles produced by doping MgAgSb. Extremely low thermal conductivity is achieved with the value of 1.046 W m −1 K −1 at 835 K. Finally, we acquire a high ZT of 1.41 at 835 K in Sn 1.025 In 0.005 Te-3%MgAgSb.

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Hole contribution to the elastic constants of SnTe

Cited by 37 publications

References 12 publications

Lattice dynamics and structure of GeTe, SnTe and PbTe

Lattice dynamics and structure of GeTe, SnTe and PbTe

Enhancement of Thermoelectric Properties in Pd–In Co-Doped SnTe and Its Phase Transition Behavior

High Thermoelectric Performance of SnTe by the Synergistic Effect of Alloy Nanoparticles with Elemental Elements

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