Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]
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 Bi _{0.96}Sb _{0.04} single crystals in the diffusive limit, which occurs only for a magneticfieldaligned electric field (E∥B). The Boltzmann transport theory with the charge pumping effect reveals the topologicalinorigin 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 Fermiliquid theory beyond the Landau Fermiliquid theory.
 Authors:

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 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:
 Report Number(s):
 LAUR1722745
Journal ID: ISSN 14761122
 Grant/Contract Number:
 AC5206NA25396; IBSR014D1; DMR1157490
 Type:
 Accepted Manuscript
 Journal Name:
 Nature Materials
 Additional Journal Information:
 Journal Volume: 16; Journal ID: ISSN 14761122
 Publisher:
 Nature Publishing Group
 Research Org:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org:
 National Science Foundation (NSF); USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 36 MATERIALS SCIENCE
 OSTI Identifier:
 1398920
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.,
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. doi: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. 2017.
"Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]". United States.
doi: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 magneticfieldaligned electric field (E∥B). The Boltzmann transport theory with the charge pumping effect reveals the topologicalinorigin 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 Fermiliquid theory beyond the Landau Fermiliquid theory.},
doi = {10.1038/nmat4965},
journal = {Nature Materials},
number = ,
volume = 16,
place = {United States},
year = {2017},
month = {8}
}
Works referenced in this record:
Colloquium: Topological insulators
journal, November 2010
journal, November 2010
 Hasan, M. Z.; Kane, C. L.
 Reviews of Modern Physics, Vol. 82, Issue 4, p. 30453067