Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]
Abstract
Ohm’s law is a fundamental paradigm in the electrical transport of metals. Any transport signatures violating Ohm’s law would give an indisputable fingerprint for a novel metallic state. Here, we uncover the breakdown of Ohm’s law owing to a topological structure of the chiral anomaly in the Weyl metal phase. We observe nonlinear I–V characteristics in Bi0.96Sb0.04 single crystals in the diffusive limit, which occurs only for a magnetic-field-aligned electric field (E∥B). The Boltzmann transport theory with the charge pumping effect reveals the topological-in-origin nonlinear conductivity, and it leads to a universal scaling function of the longitudinal magnetoconductivity, which completely describes our experimental results. Furthermore, as a hallmark of Weyl metals, the nonlinear conductivity provides a venue for nonlinear electronics, optical applications, and the development of a topological Fermi-liquid theory beyond the Landau Fermi-liquid theory.
- Authors:
-
[4];
[5];
[1]
- Pohang Univ. of Science and Technology (POSTECH), Pohang (Republic of Korea); Institute for Basic Science (IBS), Pohang (Republic of Korea)
- Pohang Univ. of Science and Technology (POSTECH), Pohang (Republic of Korea)
- Yamagata Univ., Yamagata (Japan)
- Florida State Univ., Tallahassee, FL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Daegu Univ., Gyeonbuk (Korea)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE
- OSTI Identifier:
- 1398920
- Report Number(s):
- LA-UR-17-22745
Journal ID: ISSN 1476-1122
- Grant/Contract Number:
- AC52-06NA25396; IBS-R014-D1; DMR-1157490
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Materials
- Additional Journal Information:
- Journal Volume: 16; Journal ID: ISSN 1476-1122
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Shin, Dongwoo, Lee, Yongwoo, Sasaki, M., Jeong, Yoon Hee, Weickert, Franziska, Betts, Jonathan Bobby, Kim, Heon -Jung, Kim, Ki -Seok, and Kim, Jeehoon. Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]. United States: N. p., 2017.
Web. doi:10.1038/nmat4965.
Shin, Dongwoo, Lee, Yongwoo, Sasaki, M., Jeong, Yoon Hee, Weickert, Franziska, Betts, Jonathan Bobby, Kim, Heon -Jung, Kim, Ki -Seok, & Kim, Jeehoon. Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]. United States. https://doi.org/10.1038/nmat4965
Shin, Dongwoo, Lee, Yongwoo, Sasaki, M., Jeong, Yoon Hee, Weickert, Franziska, Betts, Jonathan Bobby, Kim, Heon -Jung, Kim, Ki -Seok, and Kim, Jeehoon. Mon .
"Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]". United States. https://doi.org/10.1038/nmat4965. https://www.osti.gov/servlets/purl/1398920.
@article{osti_1398920,
title = {Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]},
author = {Shin, Dongwoo and Lee, Yongwoo and Sasaki, M. and Jeong, Yoon Hee and Weickert, Franziska and Betts, Jonathan Bobby and Kim, Heon -Jung and Kim, Ki -Seok and Kim, Jeehoon},
abstractNote = {Ohm’s law is a fundamental paradigm in the electrical transport of metals. Any transport signatures violating Ohm’s law would give an indisputable fingerprint for a novel metallic state. Here, we uncover the breakdown of Ohm’s law owing to a topological structure of the chiral anomaly in the Weyl metal phase. We observe nonlinear I–V characteristics in Bi0.96Sb0.04 single crystals in the diffusive limit, which occurs only for a magnetic-field-aligned electric field (E∥B). The Boltzmann transport theory with the charge pumping effect reveals the topological-in-origin nonlinear conductivity, and it leads to a universal scaling function of the longitudinal magnetoconductivity, which completely describes our experimental results. Furthermore, as a hallmark of Weyl metals, the nonlinear conductivity provides a venue for nonlinear electronics, optical applications, and the development of a topological Fermi-liquid theory beyond the Landau Fermi-liquid theory.},
doi = {10.1038/nmat4965},
journal = {Nature Materials},
number = ,
volume = 16,
place = {United States},
year = {Mon Aug 14 00:00:00 EDT 2017},
month = {Mon Aug 14 00:00:00 EDT 2017}
}
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