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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Zeljkovic I,Scipioni KL,Walkup D,Okada Y,Zhou W,Sankar R,Chang G,Wang YJ,Lin H,Bansil A,Chou F,Wang Z,Madhavan Vdoi
10.1038/ncomms7559subject
Has Abstractpub_date
2015-03-27 00:00:00pages
6559issn
2041-1723pii
ncomms7559journal_volume
6pub_type
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