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

Abstract

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{sub B} (Bohr magneton) of magnetic moment to Sn{sub 1−x}Mn{sub x}Te. The Curie temperature T{sub C} 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 R{sub H} 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.

Authors:
 [1]; ;  [2];  [3];  [1]
  1. Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Department of Chemistry, Northwestern University, Evanston, Illinois 60208 (United States)
  3. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
22591669
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 18; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CURIE POINT; FERROMAGNETISM; HALL EFFECT; HYSTERESIS; MAGNETIC MOMENTS; MAGNETIZATION; MANGANESE; POINT DEFECTS; THERMAL CONDUCTIVITY; THERMOELECTRICITY; TIN TELLURIDES; TOPOLOGY; VALENCE

Citation Formats

Chi, Hang, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, 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, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, 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. doi:10.1063/1.4948523.
Chi, Hang, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, 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. doi:10.1063/1.4948523.
@article{osti_22591669,
title = {A low-temperature study of manganese-induced ferromagnetism and valence band convergence in tin telluride},
author = {Chi, Hang and Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973 and Tan, Gangjian and Kanatzidis, Mercouri G. and Li, Qiang and Uher, Ctirad},
abstractNote = {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{sub B} (Bohr magneton) of magnetic moment to Sn{sub 1−x}Mn{sub x}Te. The Curie temperature T{sub C} 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 R{sub H} 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.},
doi = {10.1063/1.4948523},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 108,
place = {United States},
year = {2016},
month = {5}
}