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Nanoscale determination of the mass enhancement factor in the lightly doped bulk insulator lead selenide

Author

Listed:
  • Ilija Zeljkovic

    (Boston College)

  • Kane L. Scipioni

    (Boston College)

  • Daniel Walkup

    (Boston College)

  • Yoshinori Okada

    (Boston College
    WPI-AIMR, Tohoku University)

  • Wenwen Zhou

    (Boston College)

  • R Sankar

    (Center for Condensed Matter Sciences, National Taiwan University)

  • Guoqing Chang

    (Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore
    National University of Singapore)

  • Yung Jui Wang

    (Northeastern University)

  • Hsin Lin

    (Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore
    National University of Singapore)

  • Arun Bansil

    (Northeastern University)

  • Fangcheng Chou

    (Center for Condensed Matter Sciences, National Taiwan University)

  • Ziqiang Wang

    (Boston College)

  • Vidya Madhavan

    (Boston College
    University of Illinois Urbana-Champaign)

Abstract

Bismuth chalcogenides and lead telluride/selenide alloys exhibit exceptional thermoelectric properties that could be harnessed for power generation and device applications. Since phonons play a significant role in achieving these desired properties, quantifying the interaction between phonons and electrons, which is encoded in the Eliashberg function of a material, is of immense importance. However, its precise extraction has in part been limited due to the lack of local experimental probes. Here we construct a method to directly extract the Eliashberg function using Landau level spectroscopy, and demonstrate its applicability to lightly doped thermoelectric bulk insulator PbSe. In addition to its high energy resolution only limited by thermal broadening, this novel experimental method could be used to detect variations in mass enhancement factor at the nanoscale level. This opens up a new pathway for investigating the local effects of doping and strain on the mass enhancement factor.

Suggested Citation

  • Ilija Zeljkovic & Kane L. Scipioni & Daniel Walkup & Yoshinori Okada & Wenwen Zhou & R Sankar & Guoqing Chang & Yung Jui Wang & Hsin Lin & Arun Bansil & Fangcheng Chou & Ziqiang Wang & Vidya Madhavan, 2015. "Nanoscale determination of the mass enhancement factor in the lightly doped bulk insulator lead selenide," Nature Communications, Nature, vol. 6(1), pages 1-5, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7559
    DOI: 10.1038/ncomms7559
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