Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]

Shin, Dongwoo; Lee, Yongwoo; Sasaki, M.; Jeong, Yoon Hee; Weickert, Franziska; Betts, Jonathan Bobby; Kim, Heon -Jung; Kim, Ki -Seok; Kim, Jeehoon

doi:10.1038/nmat4965

Title: Violation of Ohm’s law in a Weyl metal [A hallmark of the Weyl metal state: Breakdown of Ohm's law]

Journal Article · Mon Aug 14 00:00:00 EDT 2017 · Nature Materials

DOI:https://doi.org/10.1038/nmat4965· OSTI ID:1398920

Shin, Dongwoo ^[1]; Lee, Yongwoo ^[2]; Sasaki, M. ^[3]; Jeong, Yoon Hee ^[2];

^[4];

^[5]; Kim, Heon -Jung ^[6]; Kim, Ki -Seok ^[2];

^[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)

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_0.96Sb_0.04 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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE

Grant/Contract Number:: AC52-06NA25396; IBS-R014-D1; DMR-1157490

OSTI ID:: 1398920

Report Number(s):: LA-UR-17-22745

Journal Information:: Nature Materials, Vol. 16; ISSN 1476-1122

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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4π-periodic Andreev bound states in a Dirac semimetal Li, Chuan; de Boer, Jorrit C.; de Ronde, Bob Nature Materials, Vol. 17, Issue 10 https://doi.org/10.1038/s41563-018-0158-6	journal	September 2018
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Flux free single crystal growth and detailed physical property characterization of Bi _1−x Sb _x (x = 0.05, 0.1 and 0.15) topological insulator Sultana, Rabia; Gurjar, Ganesh; Gahtori, Bhasker Materials Research Express, Vol. 6, Issue 10 https://doi.org/10.1088/2053-1591/ab35b9	journal	August 2019
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Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review Zheng, Hao; Hasan, M. Zahid arXiv https://doi.org/10.48550/arxiv.1805.10590	text	January 2018
Flux Free Single Crystal Growth and Detailed Physical Property Characterization of Bi1-xSbx (x = 0.05, 0.1 and 0.15) Topological Insulator Sultana, Rabia; Gurjar, Ganesh; Gahtori, Bhasker arXiv https://doi.org/10.48550/arxiv.1909.02711	text	January 2019

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