Work

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

Year: 2015

Type: article

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.

Source: Nature Communications

DOI: 10.1038/ncomms7559

Authors: 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

Institutions: Boston College, Tohoku University, National Taiwan University, National University of Singapore, Northeastern University, University of Illinois Urbana-Champaign

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $6,990

Funders: U.S. Department of Energy, National Energy Research Scientific Computing Center, National Research Foundation, National Research Foundation Singapore, National Science Council, Office of Science, Japan Society for the Promotion of Science, Basic Energy Sciences

Awards: G122673668, G1286236842, G1286251239, ELECTRONIC STRUCTURE, SPECTROSCOPY, AND CORRELATION EFFECTS IN NOVEL MATERIALS, DISORDER AND INTERACTION IN CORRELATED ELECTRON SYSTEMS, G1677143136, G222768804, G2618837358, G2684293934, G30714459, G3083819904, Imaging unconventional topological insulators, G419881185, G42916606, G4501827968, G4866772740, G498139845, G5076365615, ELECTRONIC STRUCTURE, SPECTROSCOPY AND CORRELATION EFFECTS IN NOVEL MATERIALS, DISORDER AND INTERACTION IN QUANTUM HALL SYSTEMS, G5648016710, NEW: SISGR - FOCUSED RESEARCH CENTER IN CORRELATED ELECTRONIC MATERIALS; PI-ZIQIANG WANG, G6303361091, G650090426, DISORDER AND INTERACTION IN QUANTUM HALL SYSTEMS, G6652958823, ELECTRONIC STRUCTURE, SPECTROSCOPY, AND CORRELATION EFFECTS IN NOVEL MATERIALS, ELECTRONIC STRUCTURE, SPECTROSCOPY AND CORRELATION EFFECTS IN NOVEL MATERIALS, G7936024014, G8372462003, G854546781, G969889393

OpenAlex ID: W1973450573

FWCI: 0.463

Cites: 44

Cited by: 15

Related to: 10