Atypical transport for GdTe1.8 upon substitution with Se: Strong electron-phonon coupling in polaronic conduction

Hagen Poddig; Dean Hobbis; Thomas Doert; George S. Nolas

doi:10.1016/j.scriptamat.2020.113691

Atypical transport for GdTe_1.8 upon substitution with Se: Strong electron-phonon coupling in polaronic conduction

Hagen Poddig, Dean Hobbis, Thomas Doert, George S. Nolas

Division of Medical Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The chemistry of new materials and the effects of chemical substitutions on physical properties continues to be of intense interest as it directly affects many technological fields. The synthesis and temperature dependent transport properties of GdTe_1.62Se_0.18 were investigated revealing polaronic transport upon simple alloying with selenium. Temperature-dependent resistivity and thermopower measurements indicate strong electron-phonon coupling, as compared to the few other chalcogenides that display such transport. In addition, the low thermal conductivity is intrinsic for this material, and a result of the stacking arrangement in the crystal structure as well as of a statistical disordered Te₂^2– anion.

Original language	English
Article number	113691
Journal	Scripta Materialia
Volume	194
DOIs	https://doi.org/10.1016/j.scriptamat.2020.113691
State	Published - Mar 15 2021

Keywords

Electrical conductivity
Polaron transport
Rare earth metal
Semiconductors

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10.1016/j.scriptamat.2020.113691

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title = "Atypical transport for GdTe1.8 upon substitution with Se: Strong electron-phonon coupling in polaronic conduction",

abstract = "The chemistry of new materials and the effects of chemical substitutions on physical properties continues to be of intense interest as it directly affects many technological fields. The synthesis and temperature dependent transport properties of GdTe1.62Se0.18 were investigated revealing polaronic transport upon simple alloying with selenium. Temperature-dependent resistivity and thermopower measurements indicate strong electron-phonon coupling, as compared to the few other chalcogenides that display such transport. In addition, the low thermal conductivity is intrinsic for this material, and a result of the stacking arrangement in the crystal structure as well as of a statistical disordered Te22– anion.",

keywords = "Electrical conductivity, Polaron transport, Rare earth metal, Semiconductors",

author = "Hagen Poddig and Dean Hobbis and Thomas Doert and Nolas, {George S.}",

note = "Funding Information: This work was support by the US National Science Foundation under grant No. DMR-1748188. HP gratefully acknowledges the support of the ERASMUS+ ICM WORLDWIDE exchange program funded by the European Union. Financial Support by the German Research Foundation (DFG, grant no. Do 590/6-1) is also gratefully acknowledged. DH acknowledges the II-VI Foundation Block-Gift Program. Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

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doi = "10.1016/j.scriptamat.2020.113691",

language = "English",

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T1 - Atypical transport for GdTe1.8 upon substitution with Se

T2 - Strong electron-phonon coupling in polaronic conduction

AU - Poddig, Hagen

AU - Hobbis, Dean

AU - Doert, Thomas

AU - Nolas, George S.

N1 - Funding Information: This work was support by the US National Science Foundation under grant No. DMR-1748188. HP gratefully acknowledges the support of the ERASMUS+ ICM WORLDWIDE exchange program funded by the European Union. Financial Support by the German Research Foundation (DFG, grant no. Do 590/6-1) is also gratefully acknowledged. DH acknowledges the II-VI Foundation Block-Gift Program. Publisher Copyright: © 2020 Acta Materialia Inc.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - The chemistry of new materials and the effects of chemical substitutions on physical properties continues to be of intense interest as it directly affects many technological fields. The synthesis and temperature dependent transport properties of GdTe1.62Se0.18 were investigated revealing polaronic transport upon simple alloying with selenium. Temperature-dependent resistivity and thermopower measurements indicate strong electron-phonon coupling, as compared to the few other chalcogenides that display such transport. In addition, the low thermal conductivity is intrinsic for this material, and a result of the stacking arrangement in the crystal structure as well as of a statistical disordered Te22– anion.

AB - The chemistry of new materials and the effects of chemical substitutions on physical properties continues to be of intense interest as it directly affects many technological fields. The synthesis and temperature dependent transport properties of GdTe1.62Se0.18 were investigated revealing polaronic transport upon simple alloying with selenium. Temperature-dependent resistivity and thermopower measurements indicate strong electron-phonon coupling, as compared to the few other chalcogenides that display such transport. In addition, the low thermal conductivity is intrinsic for this material, and a result of the stacking arrangement in the crystal structure as well as of a statistical disordered Te22– anion.

KW - Electrical conductivity

KW - Polaron transport

KW - Rare earth metal

KW - Semiconductors

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DO - 10.1016/j.scriptamat.2020.113691

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VL - 194

JO - Scripta Materialia

JF - Scripta Materialia

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ER -

Atypical transport for GdTe_1.8 upon substitution with Se: Strong electron-phonon coupling in polaronic conduction

Abstract

Keywords

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