@article{3d3066f04dc041cc91f256fda157e130,
title = "Nanoscale determination of the mass enhancement factor in the lightly doped bulk insulator lead selenide",
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.",
author = "Ilija Zeljkovic and Scipioni, {Kane L.} and Daniel Walkup and Yoshinori Okada and Wenwen Zhou and R. Sankar and Guoqing Chang and Wang, {Yung Jui} and Hsin Lin and Arun Bansil and Fangcheng Chou and Ziqiang Wang and Vidya Madhavan",
note = "Funding Information: V.M. gratefully acknowledges funding from the US Department of Energy, Scanned Probe Division under award number DE-FG02-12ER46880 for the support of I.Z., K.L.S., Y.O., W.Z. and D.W. for this project. Z.W. acknowledges the DOE, Office of Science, Basic Energy Sciences grants DE-SC0002554 and DE-FG02-99ER45747. H.L. acknowledges the Singapore National Research Foundation under NRF award number NRF-NRFF2013-03. F.C. acknowledges the support provided by MOST-Taiwan under project number NSC-102-2119-M-002-004. The work at Northeastern University is supported by the US Department of Energy grant number DE-FG02-07ER46352 and benefited from Northeastern University{\textquoteright}s Advanced Scientific Computation Center (ASCC) and the allocation of time at the NERSC supercomputing centre through DOE grant number DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} 2015 Macmillan Publishers Limited. All rights reserved.",
year = "2015",
month = mar,
doi = "10.1038/ncomms7559",
language = "English (US)",
volume = "6",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
}