Room-temperature chiral charge pumping in Dirac semimetals

Cheng Zhang, Enze Zhang, Weiyi Wang, Yanwen Liu, Zhi-Gang Chen (), Shiheng Lu, Sihang Liang, Junzhi Cao, Xiang Yuan, Lei Tang, Qian Li, Chao Zhou, Teng Gu, Yizheng Wu, Jin Zou () and Faxian Xiu ()
Additional contact information
Cheng Zhang: Fudan University
Enze Zhang: Fudan University
Weiyi Wang: Fudan University
Yanwen Liu: Fudan University
Zhi-Gang Chen: Materials Engineering, The University of Queensland
Shiheng Lu: Fudan University
Sihang Liang: Fudan University
Junzhi Cao: Fudan University
Xiang Yuan: Fudan University
Lei Tang: Fudan University
Qian Li: Fudan University
Chao Zhou: Fudan University
Teng Gu: Fudan University
Yizheng Wu: Fudan University
Jin Zou: Materials Engineering, The University of Queensland
Faxian Xiu: Fudan University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Chiral anomaly, a non-conservation of chiral charge pumped by the topological nontrivial gauge fields, has been predicted to exist in Weyl semimetals. However, until now, the experimental signature of this effect exclusively relies on the observation of negative longitudinal magnetoresistance at low temperatures. Here, we report the field-modulated chiral charge pumping process and valley diffusion in Cd3As2. Apart from the conventional negative magnetoresistance, we observe an unusual nonlocal response with negative field dependence up to room temperature, originating from the diffusion of valley polarization. Furthermore, a large magneto-optic Kerr effect generated by parallel electric and magnetic fields is detected. These new experimental approaches provide a quantitative analysis of the chiral anomaly phenomenon which was inaccessible previously. The ability to manipulate the valley polarization in topological semimetal at room temperature opens up a route towards understanding its fundamental properties and utilizing the chiral fermions.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/ncomms13741 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms13741

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms13741

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().