Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals
Abstract
Studies of topological semimetals have revealed spectacular transport phenomena spanning extreme magnetoresistance effects and ultrahigh mobilities. As phonon dynamics and electron-phonon scattering play a critical role in the electrical and thermal transport, in this work we pursue a fundamental understanding of these effects in type-I Weyl semimetals NbAs and TaAs. In the temperature-dependent Raman spectra of NbAs we reveal a previously unreported Fano line shape, a signature stemming from the electron-phonon interaction. Additionally, the temperature dependence of the A1 phonon linewidths in both NbAs and TaAs strongly deviate from the standard model of anharmonic decay. To capture the mechanisms responsible for the observed Fano asymmetry and the atypical phonon linewidth, we present first-principles calculations of the phonon self-energy correction due to the electron-phonon interaction. Through this study of the phonon dynamics and electron-phonon interaction in these Weyl semimetals, we consider specific microscopic pathways which could contribute to the nature of their macroscopic transport.
- Authors:
-
- Harvard Univ., Cambridge, MA (United States)
- Boston College, Chestnut Hill, MA (United States)
- Univ. of California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Photonics at Thermodynamic Limits (PTL); Krell Institute, Ames, IA (United States); Univ. of California, Los Angeles, CA (United States); Boston College, Chestnut Hill, MA (United States); Stanford Univ., CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1767740
- Grant/Contract Number:
- SC0011978; AC02-05CH11231; FG02-97ER25308; SC0018675; SC0019140; DMR-1709987
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 22; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; optics; phonons; thermal conductivity; charge transport; materials and chemistry by design; mesostructured materials; synthesis (novel materials)
Citation Formats
Coulter, Jennifer, Osterhoudt, Gavin B., Garcia, Christina A. C., Wang, Yiping, Plisson, Vincent M., Shen, Bing, Ni, Ni, Burch, Kenneth S., and Narang, Prineha. Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.100.220301.
Coulter, Jennifer, Osterhoudt, Gavin B., Garcia, Christina A. C., Wang, Yiping, Plisson, Vincent M., Shen, Bing, Ni, Ni, Burch, Kenneth S., & Narang, Prineha. Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals. United States. https://doi.org/10.1103/PhysRevB.100.220301
Coulter, Jennifer, Osterhoudt, Gavin B., Garcia, Christina A. C., Wang, Yiping, Plisson, Vincent M., Shen, Bing, Ni, Ni, Burch, Kenneth S., and Narang, Prineha. Tue .
"Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals". United States. https://doi.org/10.1103/PhysRevB.100.220301. https://www.osti.gov/servlets/purl/1767740.
@article{osti_1767740,
title = {Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals},
author = {Coulter, Jennifer and Osterhoudt, Gavin B. and Garcia, Christina A. C. and Wang, Yiping and Plisson, Vincent M. and Shen, Bing and Ni, Ni and Burch, Kenneth S. and Narang, Prineha},
abstractNote = {Studies of topological semimetals have revealed spectacular transport phenomena spanning extreme magnetoresistance effects and ultrahigh mobilities. As phonon dynamics and electron-phonon scattering play a critical role in the electrical and thermal transport, in this work we pursue a fundamental understanding of these effects in type-I Weyl semimetals NbAs and TaAs. In the temperature-dependent Raman spectra of NbAs we reveal a previously unreported Fano line shape, a signature stemming from the electron-phonon interaction. Additionally, the temperature dependence of the A1 phonon linewidths in both NbAs and TaAs strongly deviate from the standard model of anharmonic decay. To capture the mechanisms responsible for the observed Fano asymmetry and the atypical phonon linewidth, we present first-principles calculations of the phonon self-energy correction due to the electron-phonon interaction. Through this study of the phonon dynamics and electron-phonon interaction in these Weyl semimetals, we consider specific microscopic pathways which could contribute to the nature of their macroscopic transport.},
doi = {10.1103/PhysRevB.100.220301},
journal = {Physical Review B},
number = 22,
volume = 100,
place = {United States},
year = {Tue Dec 24 00:00:00 EST 2019},
month = {Tue Dec 24 00:00:00 EST 2019}
}
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