Thermoelectric performance of a metastable thin-film Heusler alloy
Hinterleitner, B.; Knapp, I.; Poneder, M.; Shi, Yongpeng; Mueller, H.; Eguchi, G.; Eisenmenger-Sittner, C.; Stoeger-Pollach, M.; Kakefuda, Y.; Kawamoto, N.; Guo, Q.; Baba, T.; Mori, T.; Ullah, Sami; Chen, Xing-Qiu; Bauer, E.
Source PublicationNATURE
AbstractThermoelectric materials transform a thermal gradient into electricity. The efficiency of this process relies on three material-dependent parameters:the Seebeck coefficient, the electrical resistivity and the thermal conductivity, summarized in the thermoelectric figure of merit. A large figure of merit is beneficial for potential applications such as thermoelectric generators. Here we report the thermal and electronic properties of thin-film Heusler alloys based on Fe2V0.8W0.2Al prepared by magnetron sputtering. Density functional theory calculations suggest that the thin films are metastable states, and measurements oft he power factor-the ratio of the Seebeck coefficient squared divided by the electrical resistivity-suggest a high intrinsic figure of merit for these thin films. This may arise from a large differential density of states at the Fermi level and a Weyl-like electron dispersion close to the Fermi level, which indicates a high mobility of charge carriers owing to linear crossing in the electronic bands.
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WOS IDWOS:000501599200045
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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Hinterleitner, B.,Knapp, I.,Poneder, M.,et al. Thermoelectric performance of a metastable thin-film Heusler alloy[J]. NATURE,2019,576(7785):85-+.
APA Hinterleitner, B..,Knapp, I..,Poneder, M..,Shi, Yongpeng.,Mueller, H..,...&Bauer, E..(2019).Thermoelectric performance of a metastable thin-film Heusler alloy.NATURE,576(7785),85-+.
MLA Hinterleitner, B.,et al."Thermoelectric performance of a metastable thin-film Heusler alloy".NATURE 576.7785(2019):85-+.
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