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

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4948523· OSTI ID:1248340
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)

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.

Research Organization:
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 Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001054; SC00112704; SC0012704
OSTI ID:
1248340
Alternate ID(s):
OSTI ID: 1250392; OSTI ID: 1255720
Report Number(s):
BNL-112117-2016-JA; APPLAB; DE-SC00112704
Journal Information:
Applied Physics Letters, Vol. 108, Issue 18; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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