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Title: A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride

Abstract

In this study, SnTe is renowned for its promise in advancing energy-related technologies based on thermoelectricity and for its topological crystalline insulator character. Here, we demonstrate that each Mn atom introduces ~4 μB (Bohr magneton) of magnetic moment to Sn1–xMnxTe. The Curie temperatureTC reaches ~14K for x = 0.12, as observed in the field dependent hysteresis of magnetization and the anomalous Hall effect. In accordance with a modified two-band electronic Kane model, the light L-valence-band and the heavy Σ-valence-band gradually converge in energy with increasing Mn concentration, leading to a decreasing ordinary Hall coefficient RH and a favorably enhanced Seebeck coefficient S at the same time. With the thermal conductivityκ lowered chiefly via point defects associated with the incorporation of Mn, the strategy of Mn doping also bodes well for efficient thermoelectric applications at elevated temperatures.

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Revolutionary Materials for Solid State Energy Conversion (RMSSEC); Univ. of Michigan, Ann Arbor, MI (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1248340
Alternate Identifier(s):
OSTI ID: 1250392; OSTI ID: 1255720
Report Number(s):
BNL-112117-2016-JA
Journal ID: ISSN 0003-6951; APPLAB; DE-SC00112704
Grant/Contract Number:  
SC0001054; SC00112704; SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 18; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; SnTe; thermoelectric; ferromagnetism; band convergence; II-VI semiconductors; doping; phonons; band structure; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chi, Hang, Tan, Gangjian, Kanatzidis, Mercouri G., Li, Qiang, and Uher, Ctirad. A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride. United States: N. p., 2016. Web. doi:10.1063/1.4948523.
Chi, Hang, Tan, Gangjian, Kanatzidis, Mercouri G., Li, Qiang, & Uher, Ctirad. A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride. United States. https://doi.org/10.1063/1.4948523
Chi, Hang, Tan, Gangjian, Kanatzidis, Mercouri G., Li, Qiang, and Uher, Ctirad. Mon . "A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride". United States. https://doi.org/10.1063/1.4948523. https://www.osti.gov/servlets/purl/1248340.
@article{osti_1248340,
title = {A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride},
author = {Chi, Hang and Tan, Gangjian and Kanatzidis, Mercouri G. and Li, Qiang and Uher, Ctirad},
abstractNote = {In this study, SnTe is renowned for its promise in advancing energy-related technologies based on thermoelectricity and for its topological crystalline insulator character. Here, we demonstrate that each Mn atom introduces ~4 μB (Bohr magneton) of magnetic moment to Sn1–xMnxTe. The Curie temperatureTC reaches ~14K for x = 0.12, as observed in the field dependent hysteresis of magnetization and the anomalous Hall effect. In accordance with a modified two-band electronic Kane model, the light L-valence-band and the heavy Σ-valence-band gradually converge in energy with increasing Mn concentration, leading to a decreasing ordinary Hall coefficient RH and a favorably enhanced Seebeck coefficient S at the same time. With the thermal conductivityκ lowered chiefly via point defects associated with the incorporation of Mn, the strategy of Mn doping also bodes well for efficient thermoelectric applications at elevated temperatures.},
doi = {10.1063/1.4948523},
journal = {Applied Physics Letters},
number = 18,
volume = 108,
place = {United States},
year = {Mon May 02 00:00:00 EDT 2016},
month = {Mon May 02 00:00:00 EDT 2016}
}

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Cited by: 13 works
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