A magneto-thermoelectric with a high figure of merit in topological insulator Bi88Sb12

Abstract High thermoelectric performance is generally achieved by synergistically optimizing two or even three of the contradictorily coupled thermoelectric parameters. Here we demonstrate magneto-thermoelectric correlation as a strategy to achieve simultaneous gain in an enhanced Seebeck coefficient and reduced thermal conductivity in topological materials. We report a large magneto-Seebeck effect and high magneto-thermoelectric figure of merit of 1.7 ± 0.2 at 180 K and 0.7 T in a single-crystalline Bi 88 Sb 12 topological insulator. This result fills a gap of a high performance below 300 K and is promising for low-temperature thermoelectric applications. The large magneto-Seebeck response is attributed to…

• AV
  Alexander von Humboldt-Stiftung
• DF
  Deutsche Forschungsgemeinschaft

  Awards: 392228380, 742068
• NN
  National Natural Science Foundation of China

  Award: 52401263
• M
  Max-Planck-Gesellschaft