Experimental determination of the Lorenz number in Cu 0.01Bi2Te2.7Se0.3 and Bi0.88Sb0.12

Lukas, K. C.; Liu, W. S.; Joshi, G.; Zebarjadi, M.; Dresselhaus, M. S.; Ren, Z. F.; Chen, G.; Opeil, C. P.

doi:10.1103/PhysRevB.85.205410

Title: Experimental determination of the Lorenz number in Cu $_{0.01}$ Bi $_{2}$ Te $_{2.7}$ Se $_{0.3}$ and Bi $_{0.88}$ Sb $_{0.12}$

Journal Article · Mon May 07 00:00:00 EDT 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.205410· OSTI ID:1386862

Lukas, K. C. ^[1]; Liu, W. S. ^[1]; Joshi, G. ^[1]; Zebarjadi, M. ^[2]; Dresselhaus, M. S. ^[2]; Ren, Z. F. ^[1]; Chen, G. ^[2]; Opeil, C. P. ^[1]

Boston College, Chestnut Hill, MA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Nanostructuring has been shown to be an effective approach to reduce the lattice thermal conductivity and improve the thermoelectric figure of merit. Because the experimentally measured thermal conductivity includes contributions from both carriers and phonons, separating out the phonon contribution has been difficult and is mostly based on estimating the electronic contributions using the Wiedemann-Franz law. In this study, an experimental method to directly measure electronic contributions to the thermal conductivity is presented and applied to Cu_0.01Bi₂Te_2.7Se_0.3, [Cu_0.01Bi₂Te_2.7Se_0.3]_0.98Ni_0.02, and Bi_0.88Sb_0.12. By measuring the thermal conductivity under magnetic field, electronic contributions to thermal conductivity can be extracted, leading to knowledge of the Lorenz number in thermoelectric materials.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0001299; FG02-09ER46577

OSTI ID:: 1386862

Alternate ID(s):: OSTI ID: 1098889

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 85, Issue 20; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 33 works

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Cited By (7)

Magnetic Field‐Enhanced Thermoelectric Performance in Dirac Semimetal Cd ₃ As ₂ Crystals with Different Carrier Concentrations Wang, Honghui; Luo, Xigang; Peng, Kunling Advanced Functional Materials, Vol. 29, Issue 37 https://doi.org/10.1002/adfm.201902437	journal	July 2019
Strategies for engineering phonon transport in thermoelectrics Kim, Woochul Journal of Materials Chemistry C, Vol. 3, Issue 40 https://doi.org/10.1039/c5tc01670c	journal	January 2015
Enhancing the thermoelectric performance of Cu ₃ SnS ₄ -based solid solutions through coordination of the Seebeck coefficient and carrier concentration Yang, Yuanbo; Ying, Pengzhan; Wang, Jinzhi Journal of Materials Chemistry A, Vol. 5, Issue 35 https://doi.org/10.1039/c7ta05253g	journal	January 2017
Characterization of Lorenz number with Seebeck coefficient measurement Kim, Hyun-Sik; Gibbs, Zachary M.; Tang, Yinglu APL Materials, Vol. 3, Issue 4 https://doi.org/10.1063/1.4908244	journal	April 2015
On the calculation of Lorenz numbers for complex thermoelectric materials Wang, Xufeng; Askarpour, Vahid; Maassen, Jesse Journal of Applied Physics, Vol. 123, Issue 5 https://doi.org/10.1063/1.5009939	journal	February 2018
Elevated temperature electrical resistivity measurements of zirconium diboride using the van der Pauw Method Neuman, Eric W.; Harrington, Gregory J. K.; Hilmas, Gregory E. Journal of the American Ceramic Society, Vol. 102, Issue 12 https://doi.org/10.1111/jace.16636	journal	June 2019
Large Nernst Power Factor over a Broad Temperature Range in Polycrystalline Weyl Semimetal NbP Fu, Chenguang; Guin, Satya N.; Watzman, Sarah J. arXiv https://doi.org/10.48550/arxiv.2003.11957	text	January 2020

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Title: Experimental determination of the Lorenz number in Cu 0.01 Bi 2 Te 2.7 Se 0.3 and Bi 0.88 Sb 0.12

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