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  Transport properties of cubic crystalline Ge2Sb2Te5: A potential low-temperature thermoelectric material

Sun, J., Mukhopadhyay, S., Subedi, A., Siegrist, T., & Singh, D. J. (2015). Transport properties of cubic crystalline Ge2Sb2Te5: A potential low-temperature thermoelectric material. Applied Physics Letters, 106(12): 123907. doi:10.1063/1.4916558.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0028-30CC-1 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0028-30CD-0
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2015
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© American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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http://dx.doi.org/10.1063/1.4916558 (Verlagsversion)
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http://arxiv.org/abs/1503.05932 (Preprint)
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 Urheber:
Sun, Jifeng1, 2, 3, Autor
Mukhopadhyay, Saikat1, Autor
Subedi, Alaska4, Autor           
Siegrist, Theo2, 3, Autor
Singh, David J.1, Autor
Affiliations:
1Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA, ou_persistent22              
2Department of Chemical and Biomedical Engineering, College of Engineering, Florida Agricultural and Mechanical University-Florida State University, 2525 Pottsdamer St., Tallahassee, Florida 32310, USA, ou_persistent22              
3National High Magnetic Field Laboratory, 1800 E. Paul Dirac Dr., Tallahassee, Florida 32310, USA, ou_persistent22              
4Theory of Complex Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074318              

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Schlagwörter: Doping; Germanium; Thermoelectric effects; Elemental semiconductors; Boltzmann equations
 Zusammenfassung: Ge2Sb2Te5 (GST) has been widely used as a popular phase change material. In this study, we show that it exhibits high Seebeck coefficients 200–300 μV/K in its cubic crystalline phase (c-GST) at remarkably high p-type doping levels of ∼1 × 1019–6 × 1019 cm−3 at room temperature. More importantly, at low temperature (T = 200 K), the Seebeck coefficient was found to exceed 200 μV/K for a doping range of 1 × 1019–3.5 × 1019 cm−3. Given that the lattice thermal conductivity in this phase has already been measured to be extremely low (∼0.7 W/m-K at 300 K) [K. S. Siegert et al., Rep. Prog. Phys. 78, 013001 (2015)], our results suggest the possibility of using c-GST as a low-temperature thermoelectric material.

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Sprache(n): eng - English
 Datum: 2015-02-262015-03-182015-03-262015-03-23
 Publikationsstatus: Erschienen
 Seiten: 4
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1063/1.4916558
arXiv: 1503.05932
 Art des Abschluß: -

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Titel: Applied Physics Letters
  Kurztitel : Appl. Phys. Lett.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Melville, NY : American Institute of Physics
Seiten: - Band / Heft: 106 (12) Artikelnummer: 123907 Start- / Endseite: - Identifikator: Anderer: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223