skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe

Abstract

Local thermal magnetization fluctuations in Li-doped MnTe are found to increase its thermopower α strongly at temperatures up to 900 K. Below the Néel temperature ( T N~ 307 K), MnTe is antiferromagnetic, and magnon drag contributes α mdto the thermopower, which scales as ~T 3. Magnon drag persists into the paramagnetic state up to >3 × T N because of long-lived, short-range antiferromagnet-like fluctuations (paramagnons) shown by neutron spectroscopy to exist in the paramagnetic state. The paramagnon lifetime is longer than the charge carrier–magnon interaction time; its spin-spin spatial correlation length is larger than the free-carrier effective Bohr radius and de Broglie wavelength. Thus, to itinerant carriers, paramagnons look like magnons and give a paramagnon-drag thermopower. This contribution results in an optimally doped material having a thermoelectric figure of merit ZT> 1 at T> ~900 K, the first material with a technologically meaningful thermoelectric energy conversion efficiency from a spin-caloritronic effect.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [3];  [2]; ORCiD logo [4]; ORCiD logo [2];  [2];  [2]; ORCiD logo [4]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [2]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. North Carolina State Univ., Raleigh, NC (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1564212
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 9; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zheng, Y., Lu, T., Polash, Md M. H., Rasoulianboroujeni, M., Liu, N., Manley, Michael E., Deng, Y., Sun, P. J., Chen, X. L., Hermann, Raphael P., Vashaee, D., Heremans, J. P., and Zhao, H. Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe. United States: N. p., 2019. Web. doi:10.1126/sciadv.aat9461.
Zheng, Y., Lu, T., Polash, Md M. H., Rasoulianboroujeni, M., Liu, N., Manley, Michael E., Deng, Y., Sun, P. J., Chen, X. L., Hermann, Raphael P., Vashaee, D., Heremans, J. P., & Zhao, H. Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe. United States. doi:10.1126/sciadv.aat9461.
Zheng, Y., Lu, T., Polash, Md M. H., Rasoulianboroujeni, M., Liu, N., Manley, Michael E., Deng, Y., Sun, P. J., Chen, X. L., Hermann, Raphael P., Vashaee, D., Heremans, J. P., and Zhao, H. Fri . "Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe". United States. doi:10.1126/sciadv.aat9461. https://www.osti.gov/servlets/purl/1564212.
@article{osti_1564212,
title = {Paramagnon drag in high thermoelectric figure of merit Li-doped MnTe},
author = {Zheng, Y. and Lu, T. and Polash, Md M. H. and Rasoulianboroujeni, M. and Liu, N. and Manley, Michael E. and Deng, Y. and Sun, P. J. and Chen, X. L. and Hermann, Raphael P. and Vashaee, D. and Heremans, J. P. and Zhao, H.},
abstractNote = {Local thermal magnetization fluctuations in Li-doped MnTe are found to increase its thermopower α strongly at temperatures up to 900 K. Below the Néel temperature (TN~ 307 K), MnTe is antiferromagnetic, and magnon drag contributes αmdto the thermopower, which scales as ~T3. Magnon drag persists into the paramagnetic state up to >3 ×TN because of long-lived, short-range antiferromagnet-like fluctuations (paramagnons) shown by neutron spectroscopy to exist in the paramagnetic state. The paramagnon lifetime is longer than the charge carrier–magnon interaction time; its spin-spin spatial correlation length is larger than the free-carrier effective Bohr radius and de Broglie wavelength. Thus, to itinerant carriers, paramagnons look like magnons and give a paramagnon-drag thermopower. This contribution results in an optimally doped material having a thermoelectric figure of merit ZT> 1 at T> ~900 K, the first material with a technologically meaningful thermoelectric energy conversion efficiency from a spin-caloritronic effect.},
doi = {10.1126/sciadv.aat9461},
journal = {Science Advances},
issn = {2375-2548},
number = 9,
volume = 5,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Figures / Tables:

Fig. 1 Fig. 1: Transport properties of Li-doped MnTe. (A) Thermopower, (B) resistivity, (C) thermal conductivity, and (D) thermoelectric figure of merit ZT. The Li concentrations for all frames are shown in the inset of frame (B).

Save / Share:

Works referenced in this record:

Magnon drag effect in magnetic semiconductors
journal, January 1972


Spin-wave measurements on hexagonal MnTe of NiAs -type structure by inelastic neutron scattering
journal, March 2006


Contributions to the Theory of the Anomalous Hall Effect in Ferro- and Antiferromagnetic Materials
journal, August 1967


Magnon Drag at Optical Frequencies and the Infrared Spectrum of MnTe
journal, February 1968

  • Zanmarchi, G.; Haas, C.
  • Journal of Applied Physics, Vol. 39, Issue 2
  • DOI: 10.1063/1.2163537

Contribution of magnon-drag to the thermoelectric power of antiferromagnetic Mn Te
journal, March 1964


Spin-transfer mechanism for magnon-drag thermopower
journal, December 2011

  • Lucassen, M. E.; Wong, C. H.; Duine, R. A.
  • Applied Physics Letters, Vol. 99, Issue 26
  • DOI: 10.1063/1.3672207

Hall Effect in CoO, NiO, and α Fe 2 O 3
journal, June 1967


Magnon-drag thermopower and Nernst coefficient in Fe, Co, and Ni
journal, October 2016

  • Watzman, Sarah J.; Duine, Rembert A.; Tserkovnyak, Yaroslav
  • Physical Review B, Vol. 94, Issue 14
  • DOI: 10.1103/PhysRevB.94.144407

Landau-Lifshitz theory of the magnon-drag thermopower
journal, September 2016


Optical properties and electronic structure of crossroads material MnTe
journal, November 1977


Magnetic Properties of Manganese Telluride Single Crystals
journal, March 1963

  • Komatsubara, Takemi; Murakami, Miyuki; Hirahara, Eiji
  • Journal of the Physical Society of Japan, Vol. 18, Issue 3
  • DOI: 10.1143/JPSJ.18.356

Thermal spin transport and energy conversion
journal, June 2017


Thermoelectric study of crossroads material MnTe via sulfur doping
journal, March 2014

  • Xie, Wenjie; Populoh, Sascha; Gałązka, Krzysztof
  • Journal of Applied Physics, Vol. 115, Issue 10
  • DOI: 10.1063/1.4868584

Synergistic effect by Na doping and S substitution for high thermoelectric performance of p-type MnTe
journal, January 2017

  • Ren, Yangyang; Yang, Junyou; Jiang, Qinghui
  • Journal of Materials Chemistry C, Vol. 5, Issue 21
  • DOI: 10.1039/C7TC01480E

Magnon-Drag Thermopower in Iron
journal, March 1967


Tetradymites as thermoelectrics and topological insulators
journal, September 2017


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.