Mixed-valence impurities in lead telluride-based solid solutions

Volkov, B. A.; Ryabova, L. I.; Khokhlov, D. R.

doi:10.1070/pu2002v045n08abeh001146

Cited by 168 publications

(116 citation statements)

References 79 publications

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“…Upon doping with Tl impurities [1,2] a number of striking anomalies appear in the low temperature properties. These anomalies, described below, are currently not well understood.…”

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confidence: 99%

Charge Kondo Anomalies in PbTe Doped with Tl Impurities

Costi

Zlatič

2012

Phys. Rev. Lett.

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We investigate the properties of PbTe doped with a small concentration x of Tl impurities acting as acceptors and described by Anderson impurities with negative onsite correlation energy. We use the numerical renormalization group method to show that the resulting charge Kondo effect naturally accounts for the unusual low temperature and doping dependence of normal state properties, including the self-compensation effect in the carrier density and the nonmagnetic Kondo anomaly in the resistivity. These are found to be in good qualitative agreement with experiment. Our results for the Tl s-electron spectral function provide a new interpretation of point contact data.

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“…Upon doping with Tl impurities [1,2] a number of striking anomalies appear in the low temperature properties. These anomalies, described below, are currently not well understood.…”

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confidence: 99%

Charge Kondo Anomalies in PbTe Doped with Tl Impurities

Costi

Zlatič

2012

Phys. Rev. Lett.

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“…In the field of thermoelectricity, one desires to maximize a material's figure of merit zT=S 2 σT/κ, where S is the Seebeck coefficient or thermopower, σ =1/ρ the electrical conductivity (ρ=resistivity) and κ the thermal conductivity. After the identification of Tl as a p-type resonant impurity in PbTe that can increase zT, 1 we sought other impurities that could act as n-type resonant levels.…”

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Thermoelectric transport properties of then-type impurity Al in PbTe

Jaworski

Heremans

2012

Phys. Rev. B

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“…% In content, which happens due to Fermi level pinning. 12,13 This could also be useful for PbTe 1-y Se y alloys for achieving homogeneity of transport properties over a larger temperature range. Second, even though other group III elements like Tl have been found to form resonant level in PbTe, 14 In has not been found to do so in either PbTe or PbSe.…”

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Thermoelectric properties of indium doped PbTe1-ySey alloys

Bali

Wang

Snyder

et al. 2014

Journal of Applied Physics

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High-output-power densities from molecular beam epitaxy grown n-and p-type PbTeSe-based thermoelectrics via improved contact metallization J. Appl. Phys. 111, 104501 (2012) Lead telluride and its alloys are well known for their thermoelectric applications. Here, a systematic study of PbTe 1-y Se y alloys doped with indium has been done. The powder X-Ray diffraction combined with Rietveld analysis confirmed the polycrystalline single phase nature of the samples, while microstructural analysis with scanning electron microscope results showed densification of samples and presence of micrometer sized particles. The temperature dependent transport properties showed that in these alloys, indium neither pinned the Fermi level as it does in PbTe, nor acted as a resonant dopant as in SnTe. At high temperatures, bipolar effect was observed which restricted the zT to 0.66 at 800 K for the sample with 30% Se content. V C 2014 AIP Publishing LLC.

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Mixed-valence impurities in lead telluride-based solid solutions

Cited by 168 publications

References 79 publications

Charge Kondo Anomalies in PbTe Doped with Tl Impurities

Charge Kondo Anomalies in PbTe Doped with Tl Impurities

Thermoelectric transport properties of then-type impurity Al in PbTe

Thermoelectric properties of indium doped PbTe1-ySey alloys

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