Nanoscale stacking faults induced low thermal conductivity in thermoelectric layered metal sulfides

Chunlei Wan; Yifeng Wang; Wataru Norimatsu; Michiko Kusunoki; Kunihito Koumoto

doi:10.1063/1.3691887

Nanoscale stacking faults induced low thermal conductivity in thermoelectric layered metal sulfides

Chunlei Wan, Yifeng Wang, Wataru Norimatsu, Michiko Kusunoki, Kunihito Koumoto

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摘要

Layered metal sulfides (MS) _1x(TiS ₂) ₂ (M Pb, Sn, Bi) with alternative stacking of MS layers and TiS ₂ layers (a natural superlattice) have been proposed as thermoelectric materials. In this paper, various nanoscale stacking faults have been found in these materials, including the translational disorder in (SnS) _1.2(TiS ₂) ₂ and the staging disorder in (BiS) _1.2(TiS ₂) ₂. The lattice thermal conductivities along the layers are systematically and significantly reduced by these stacking faults which are only a few unit cells apart, without deteriorating the electron mobility, demonstrating a phonon-blocking, electron-transmitting scenario.

源语言	英语
文章编号	101913
期刊	Applied Physics Letters
卷	100
期	10
DOI	https://doi.org/10.1063/1.3691887
出版状态	已出版 - 5 3月 2012
已对外发布	是

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abstract = "Layered metal sulfides (MS) 1x(TiS 2) 2 (M Pb, Sn, Bi) with alternative stacking of MS layers and TiS 2 layers (a natural superlattice) have been proposed as thermoelectric materials. In this paper, various nanoscale stacking faults have been found in these materials, including the translational disorder in (SnS) 1.2(TiS 2) 2 and the staging disorder in (BiS) 1.2(TiS 2) 2. The lattice thermal conductivities along the layers are systematically and significantly reduced by these stacking faults which are only a few unit cells apart, without deteriorating the electron mobility, demonstrating a phonon-blocking, electron-transmitting scenario.",

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AU - Wan, Chunlei

AU - Wang, Yifeng

AU - Norimatsu, Wataru

AU - Kusunoki, Michiko

AU - Koumoto, Kunihito

PY - 2012/3/5

Y1 - 2012/3/5

N2 - Layered metal sulfides (MS) 1x(TiS 2) 2 (M Pb, Sn, Bi) with alternative stacking of MS layers and TiS 2 layers (a natural superlattice) have been proposed as thermoelectric materials. In this paper, various nanoscale stacking faults have been found in these materials, including the translational disorder in (SnS) 1.2(TiS 2) 2 and the staging disorder in (BiS) 1.2(TiS 2) 2. The lattice thermal conductivities along the layers are systematically and significantly reduced by these stacking faults which are only a few unit cells apart, without deteriorating the electron mobility, demonstrating a phonon-blocking, electron-transmitting scenario.

AB - Layered metal sulfides (MS) 1x(TiS 2) 2 (M Pb, Sn, Bi) with alternative stacking of MS layers and TiS 2 layers (a natural superlattice) have been proposed as thermoelectric materials. In this paper, various nanoscale stacking faults have been found in these materials, including the translational disorder in (SnS) 1.2(TiS 2) 2 and the staging disorder in (BiS) 1.2(TiS 2) 2. The lattice thermal conductivities along the layers are systematically and significantly reduced by these stacking faults which are only a few unit cells apart, without deteriorating the electron mobility, demonstrating a phonon-blocking, electron-transmitting scenario.

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Nanoscale stacking faults induced low thermal conductivity in thermoelectric layered metal sulfides

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