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

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 μ B (Bohr magneton) of magnetic moment to Sn 1–xMn xTe. 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 R H 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.
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:
Report Number(s):
Journal ID: ISSN 0003-6951; APPLAB; DE-SC00112704
Grant/Contract Number:
SC0001054; SC00112704; SC0012704
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 18; Journal ID: ISSN 0003-6951
American Institute of Physics (AIP)
Research Org:
Univ. of Michigan, Ann Arbor, MI (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
25 ENERGY STORAGE; SnTe; thermoelectric; ferromagnetism; band convergence; II-VI semiconductors; doping; phonons; band structure; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1250392; OSTI ID: 1255720