A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride
- Univ. of Michigan, Ann Arbor, MI (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Northwestern Univ., Evanston, IL (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- 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
Web of Science
Coupling of charge carriers with magnetic entropy for power factor enhancement in Mn doped Sn 1.03 Te for thermoelectric applications
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journal | January 2018 |
Ferromagnetic phase transition in topological crystalline insulator thin films: Interplay of anomalous Hall angle and magnetic anisotropy
|
journal | October 2019 |
Ferromagnetic phase transition in topological crystalline insulator thin films: interplay of anomalous Hall angle and magnetic anisotropy | text | January 2019 |
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