Quantized thermoelectric Hall effect induces giant power factor in a topological semimetal
Name
s41467-020-19850-2.pdf
Description
Published version
Size
2.75 MB
Format
Adobe PDF
Checksum (MD5)
3adc327c53716f034c1bb6293d634e08
Author(s)
Han, Fei
Andrejevic, Nina
Nguyen, Thanh
Kozii, Vladyslav
Nguyen, Quynh T
Hogan, Tom
Ding, Zhiwei
Pablo-Pedro, Ricardo
Parjan, Shreya
Skinner, Brian
Date Issued
2020
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Version
Final published version
Abstract
© 2020, The Author(s). Thermoelectrics are promising by directly generating electricity from waste heat. However, (sub-)room-temperature thermoelectrics have been a long-standing challenge due to vanishing electronic entropy at low temperatures. Topological materials offer a new avenue for energy harvesting applications. Recent theories predicted that topological semimetals at the quantum limit can lead to a large, non-saturating thermopower and a quantized thermoelectric Hall conductivity approaching a universal value. Here, we experimentally demonstrate the non-saturating thermopower and quantized thermoelectric Hall effect in the topological Weyl semimetal (WSM) tantalum phosphide (TaP). An ultrahigh longitudinal thermopower Sxx~1.1×103μVK−1 and giant power factor ~525μWcm−1K−2 are observed at ~40 K, which is largely attributed to the quantized thermoelectric Hall effect. Our work highlights the unique quantized thermoelectric Hall effect realized in a WSM toward low-temperature energy harvesting applications.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41467-020-19850-2
