Peierls distortion as a route to high thermoelectric performance in In4Se3-δ crystals

Jong-Soo Rhyee, Kyu Hyoung Lee, Sang Mock Lee (), Eunseog Cho, Sang Il Kim, Eunsung Lee, Yong Seung Kwon, Ji Hoon Shim and Gabriel Kotliar
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Jong-Soo Rhyee: Materials Research Laboratory, Samsung Advanced Institute of Technology
Kyu Hyoung Lee: Materials Research Laboratory, Samsung Advanced Institute of Technology
Sang Mock Lee: Materials Research Laboratory, Samsung Advanced Institute of Technology
Eunseog Cho: Materials Research Laboratory, Samsung Advanced Institute of Technology
Sang Il Kim: Materials Research Laboratory, Samsung Advanced Institute of Technology
Eunsung Lee: Materials Research Laboratory, Samsung Advanced Institute of Technology
Yong Seung Kwon: Sung Kyun Kwan University
Ji Hoon Shim: Pohang University of Science and Technology
Gabriel Kotliar: Rutgers University, Piscataway, New Jersey 08854-8019, USA

Nature, 2009, vol. 459, issue 7249, 965-968

Abstract: Thermoelectric materials via Peierls distortion Thermoelectric materials, which convert heat into electricity, are much studied for their potential in energy-saving applications — for example as a way of recovering waste heat in cars. At present, though, these materials are inefficient, with very few of them achieving a thermoelectric figure of merit (ZT) above one in the mid-temperature range (500–900 K). Now a figure of merit of 1.48, notably high for a bulk material, is reported for indium selenide crystals (In4Se3–δ) at 705 K. The high thermoelectric performance of this material is related to a Peierls distortion of the crystal lattice at 710 K. This work suggests a new direction in the search for high-performance thermoelectric materials, exploiting intrinsic nanostructural bulk properties induced by charge density waves.

Date: 2009
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DOI: 10.1038/nature08088

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