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원자제어 저차원 전자계 연구단
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Violation of Ohm’s law in a Weyl metal

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Title
Violation of Ohm’s law in a Weyl metal
Author(s)
Dongwoo Shin; Yongwoo Lee; M.Sasaki; Yoon Hee Jeong; Franziska Weickert; Jon B. Betts; Heon-Jung Kim; Ki-Seok Kim; Jeehoon Kim
Publication Date
2017-11
Journal
NATURE MATERIALS, v.16, no.11, pp.1096 - 1099
Publisher
NATURE PUBLISHING GROUP
Abstract
Ohm’s lawis a fundamental paradigm in the electrical transport of metals1. Any transport signatures violating Ohm’s lawwould 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 diusive limit, which occurs only for a magnetic-field-aligned electric field (EkB). The Boltzmann transport theory with the charge pumping eect 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. As a hallmark ofWeyl 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. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/4041
ISSN
1476-1122
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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