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A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 182,101 : digital, PDF file
Additional Creators
United States. Department of Energy. Office of Basic Energy Sciences and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Here, 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 temperature TC reaches ~ 14 K 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 conductivity κ 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.
Report Numbers
E 1.99:1248340
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Note
Published through SciTech Connect.
05/02/2016.
"DE-SC00112704"
Applied Physics Letters 108 18 ISSN 0003-6951; APPLAB AM
Hang Chi; Gangjian Tan; Mercouri G. Kanatzidis; Qiang Li; Ctirad Uher.
Univ. of Michigan, Ann Arbor, MI (United States)
Funding Information
SC0001054
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