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Title: Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials

Abstract

Here, we analyze the thermoelectric response of Dirac and Weyl semimetals using the semiclassical approach, focusing on the extrinsic contributions due to skew-scattering and side jump. Our results apply to the linear response Nernst effect in ferromagnetic Dirac materials such as Fe3Sn2 and Weyl semimetals like Co3Sn2S2. In the case of Fe3Sn2 we obtain a very good agreement with known experimental anomalous Hall effect measurements, and based on that we predict a large Nernst effect in this material.We also extend the investigation to second-order response, focusing on monolayer graphene on hBN with trigonal warping as an example. Our analysis indicates that the extrinsic contributions can be a significant component of anomalous Nernst response and may be used to explain an enhanced thermoelectric response.

Authors:
ORCiD logo [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1852720
Grant/Contract Number:  
SC0018945
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 103; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials Science; Physics

Citation Formats

Papaj, Michał, and Fu, Liang. Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials. United States: N. p., 2021. Web. doi:10.1103/physrevb.103.075424.
Papaj, Michał, & Fu, Liang. Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials. United States. https://doi.org/10.1103/physrevb.103.075424
Papaj, Michał, and Fu, Liang. Mon . "Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials". United States. https://doi.org/10.1103/physrevb.103.075424. https://www.osti.gov/servlets/purl/1852720.
@article{osti_1852720,
title = {Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials},
author = {Papaj, Michał and Fu, Liang},
abstractNote = {Here, we analyze the thermoelectric response of Dirac and Weyl semimetals using the semiclassical approach, focusing on the extrinsic contributions due to skew-scattering and side jump. Our results apply to the linear response Nernst effect in ferromagnetic Dirac materials such as Fe3Sn2 and Weyl semimetals like Co3Sn2S2. In the case of Fe3Sn2 we obtain a very good agreement with known experimental anomalous Hall effect measurements, and based on that we predict a large Nernst effect in this material.We also extend the investigation to second-order response, focusing on monolayer graphene on hBN with trigonal warping as an example. Our analysis indicates that the extrinsic contributions can be a significant component of anomalous Nernst response and may be used to explain an enhanced thermoelectric response.},
doi = {10.1103/physrevb.103.075424},
journal = {Physical Review. B},
number = 7,
volume = 103,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2021},
month = {Mon Feb 15 00:00:00 EST 2021}
}

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