Experimental Tests of the Chiral Anomaly Magnetoresistance in the Dirac-Weyl Semimetals and GdPtBi
Abstract
In the Dirac-Weyl semimetal, the chiral anomaly appears as an “axial” current arising from charge pumping between the lowest (chiral) Landau levels of the Weyl nodes, when an electric field is applied parallel to a magnetic field B . Evidence for the chiral anomaly was obtained from the longitudinal magnetoresistance (LMR) in Na3Bi and GdPtBi. However, current-jetting effects (focusing of the current density J) have raised general concerns about LMR experiments. Here, we implement a litmus test that allows the intrinsic LMR in Na3Bi and GdPtBi to be sharply distinguished from pure current-jetting effects (in pure Bi). Current jetting enhances J along the mid-line (spine) of the sample while decreasing it at the edge. We measure the distortion by comparing the local voltage drop at the spine (expressed as the resistance Rspine) with that at the edge (Redge). In Bi, R spine sharply increases with B, but Redge decreases (jetting effects are dominant). However, in Na3Bi and GdPtBi, both Rspine and Redge decrease (jetting effects are subdominant). A numerical simulation allows the jetting distortions to be removed entirely. We find that the intrinsic longitudinal resistivity ρxx(B) in Na3Bi decreases by a factor of 10.9 between B = 0 and 10more »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1458790
- Alternate Identifier(s):
- OSTI ID: 1498998
- Grant/Contract Number:
- SC0011978
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 8 Journal Issue: 3; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Liang, Sihang, Lin, Jingjing, Kushwaha, Satya, Xing, Jie, Ni, Ni, Cava, R. J., and Ong, N. P. Experimental Tests of the Chiral Anomaly Magnetoresistance in the Dirac-Weyl Semimetals Na 3 Bi and GdPtBi. United States: N. p., 2018.
Web. doi:10.1103/PhysRevX.8.031002.
Liang, Sihang, Lin, Jingjing, Kushwaha, Satya, Xing, Jie, Ni, Ni, Cava, R. J., & Ong, N. P. Experimental Tests of the Chiral Anomaly Magnetoresistance in the Dirac-Weyl Semimetals Na 3 Bi and GdPtBi. United States. https://doi.org/10.1103/PhysRevX.8.031002
Liang, Sihang, Lin, Jingjing, Kushwaha, Satya, Xing, Jie, Ni, Ni, Cava, R. J., and Ong, N. P. Tue .
"Experimental Tests of the Chiral Anomaly Magnetoresistance in the Dirac-Weyl Semimetals Na 3 Bi and GdPtBi". United States. https://doi.org/10.1103/PhysRevX.8.031002.
@article{osti_1458790,
title = {Experimental Tests of the Chiral Anomaly Magnetoresistance in the Dirac-Weyl Semimetals Na 3 Bi and GdPtBi},
author = {Liang, Sihang and Lin, Jingjing and Kushwaha, Satya and Xing, Jie and Ni, Ni and Cava, R. J. and Ong, N. P.},
abstractNote = {In the Dirac-Weyl semimetal, the chiral anomaly appears as an “axial” current arising from charge pumping between the lowest (chiral) Landau levels of the Weyl nodes, when an electric field is applied parallel to a magnetic field B . Evidence for the chiral anomaly was obtained from the longitudinal magnetoresistance (LMR) in Na3Bi and GdPtBi. However, current-jetting effects (focusing of the current density J) have raised general concerns about LMR experiments. Here, we implement a litmus test that allows the intrinsic LMR in Na3Bi and GdPtBi to be sharply distinguished from pure current-jetting effects (in pure Bi). Current jetting enhances J along the mid-line (spine) of the sample while decreasing it at the edge. We measure the distortion by comparing the local voltage drop at the spine (expressed as the resistance Rspine) with that at the edge (Redge). In Bi, R spine sharply increases with B, but Redge decreases (jetting effects are dominant). However, in Na3Bi and GdPtBi, both Rspine and Redge decrease (jetting effects are subdominant). A numerical simulation allows the jetting distortions to be removed entirely. We find that the intrinsic longitudinal resistivity ρxx(B) in Na3Bi decreases by a factor of 10.9 between B = 0 and 10 T. A second litmus test is obtained from the parametric plot of the planar angular magnetoresistance. These results considerably strengthen the evidence for the intrinsic nature of the chiral-anomaly-induced LMR. As a result we briefly discuss how the squeeze test may be extended to test ZrTe5.},
doi = {10.1103/PhysRevX.8.031002},
journal = {Physical Review. X},
number = 3,
volume = 8,
place = {United States},
year = {Tue Jul 03 00:00:00 EDT 2018},
month = {Tue Jul 03 00:00:00 EDT 2018}
}
https://doi.org/10.1103/PhysRevX.8.031002
Web of Science
Works referenced in this record:
Dirac semimetal and topological phase transitions in Bi ( , K, Rb)
journal, May 2012
- Wang, Zhijun; Sun, Yan; Chen, Xing-Qiu
- Physical Review B, Vol. 85, Issue 19
Anomalous conductivity tensor in the Dirac semimetal Na 3 Bi
journal, April 2016
- Xiong, Jun; Kushwaha, Satya; Krizan, Jason
- EPL (Europhysics Letters), Vol. 114, Issue 2
Probing the Chiral Anomaly with Nonlocal Transport in Three-Dimensional Topological Semimetals
journal, September 2014
- Parameswaran, S. A.; Grover, T.; Abanin, D. A.
- Physical Review X, Vol. 4, Issue 3
The Adler-Bell-Jackiw anomaly and Weyl fermions in a crystal
journal, November 1983
- Nielsen, H. B.; Ninomiya, Masao
- Physics Letters B, Vol. 130, Issue 6
Observation of the Chiral-Anomaly-Induced Negative Magnetoresistance in 3D Weyl Semimetal TaAs
journal, August 2015
- Huang, Xiaochun; Zhao, Lingxiao; Long, Yujia
- Physical Review X, Vol. 5, Issue 3
A PCAC puzzle: π0→γγ in the σ-model
journal, March 1969
- Bell, J. S.; Jackiw, R.
- Il Nuovo Cimento A, Vol. 60, Issue 1
Chiral anomaly and classical negative magnetoresistance of Weyl metals
journal, September 2013
- Son, D. T.; Spivak, B. Z.
- Physical Review B, Vol. 88, Issue 10
Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry
journal, June 2012
- Fang, Chen; Gilbert, Matthew J.; Dai, Xi
- Physical Review Letters, Vol. 108, Issue 26
Chiral magnetic effect in ZrTe5
journal, February 2016
- Li, Qiang; Kharzeev, Dmitri E.; Zhang, Cheng
- Nature Physics, Vol. 12, Issue 6
Classification of stable three-dimensional Dirac semimetals with nontrivial topology
journal, September 2014
- Yang, Bohm-Jung; Nagaosa, Naoto
- Nature Communications, Vol. 5, Issue 1
On the search for the chiral anomaly in Weyl semimetals: the negative longitudinal magnetoresistance
journal, August 2016
- Reis, R. D. dos; Ajeesh, M. O.; Kumar, N.
- New Journal of Physics, Vol. 18, Issue 8
Giant planar Hall effect in topological metals
journal, July 2017
- Burkov, A. A.
- Physical Review B, Vol. 96, Issue 4
Quantum Hall effects in a Weyl semimetal: Possible application in pyrochlore iridates
journal, August 2011
- Yang, Kai-Yu; Lu, Yuan-Ming; Ran, Ying
- Physical Review B, Vol. 84, Issue 7
The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
journal, June 2016
- Hirschberger, Max; Kushwaha, Satya; Wang, Zhijun
- Nature Materials, Vol. 15, Issue 11
Negative magnetoresistance in Weyl semimetals NbAs and NbP: Intrinsic chiral anomaly and extrinsic effects
journal, June 2017
- Li, Yupeng; Wang, Zhen; Li, Pengshan
- Frontiers of Physics, Vol. 12, Issue 3
Axial-Vector Vertex in Spinor Electrodynamics
journal, January 1969
- Adler, Stephen L.
- Physical Review, Vol. 177, Issue 5
Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates
journal, May 2011
- Wan, Xiangang; Turner, Ari M.; Vishwanath, Ashvin
- Physical Review B, Vol. 83, Issue 20
Evidence for the chiral anomaly in the Dirac semimetal Na3Bi
journal, September 2015
- Xiong, J.; Kushwaha, S. K.; Liang, T.
- Science, Vol. 350, Issue 6259
Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal
journal, February 2016
- Zhang, Cheng-Long; Xu, Su-Yang; Belopolski, Ilya
- Nature Communications, Vol. 7, Issue 1
Dirac Semimetal in Three Dimensions
journal, April 2012
- Young, S. M.; Zaheer, S.; Teo, J. C. Y.
- Physical Review Letters, Vol. 108, Issue 14
Negative longitudinal magnetoresistance in Dirac and Weyl metals
journal, June 2015
- Burkov, A. A.
- Physical Review B, Vol. 91, Issue 24
Anomalous Hall effect in ZrTe5
journal, March 2018
- Liang, Tian; Lin, Jingjing; Gibson, Quinn
- Nature Physics, Vol. 14, Issue 5