Large magnetoresistance in the antiferromagnetic semimetal NdSb
Abstract
There has been considerable interest in topological semimetals that exhibit extreme magnetoresistance (XMR). These have included materials lacking inversion symmetry such as TaAs, as well Dirac semimetals such as Cd3As2. However, it was reported recently that LaSb and LaBi also exhibit XMR, even though the rocksalt structure of these materials has inversion symmetry, and the band-structure calculations do not show a Dirac dispersion in the bulk. In this paper, we present magnetoresistance and specific-heat measurements on NdSb, which is isostructural with LaSb. NdSb has an antiferromagnetic ground state and, in analogy with the lanthanum monopnictides, is expected to be a topologically nontrivial semimetal. We show that NdSb has an XMR of ~104%, even within the antiferromagnetic state, illustrating that XMR can occur independently of the absence of time-reversal symmetry breaking in zero magnetic field. The persistence of XMR in a magnetic system offers the promise of new functionality when combining topological matter with electronic correlations. Finally, we also find that in an applied magnetic field below the Néel temperature there is a first-order transition, consistent with evidence from previous neutron scattering work.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); LANL Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1409760
- Alternate Identifier(s):
- OSTI ID: 1254680
- Report Number(s):
- LA-UR-16-21357
Journal ID: ISSN 2469-9950
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 20; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; antiferromagnetism; conductivity; phase diagrams; Shubnikov-de Haas effect; topological materials; condensed matter & materials physics
Citation Formats
Wakeham, N., Bauer, E. D., Neupane, M., and Ronning, F. Large magnetoresistance in the antiferromagnetic semimetal NdSb. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.93.205152.
Wakeham, N., Bauer, E. D., Neupane, M., & Ronning, F. Large magnetoresistance in the antiferromagnetic semimetal NdSb. United States. https://doi.org/10.1103/PhysRevB.93.205152
Wakeham, N., Bauer, E. D., Neupane, M., and Ronning, F. Fri .
"Large magnetoresistance in the antiferromagnetic semimetal NdSb". United States. https://doi.org/10.1103/PhysRevB.93.205152. https://www.osti.gov/servlets/purl/1409760.
@article{osti_1409760,
title = {Large magnetoresistance in the antiferromagnetic semimetal NdSb},
author = {Wakeham, N. and Bauer, E. D. and Neupane, M. and Ronning, F.},
abstractNote = {There has been considerable interest in topological semimetals that exhibit extreme magnetoresistance (XMR). These have included materials lacking inversion symmetry such as TaAs, as well Dirac semimetals such as Cd3As2. However, it was reported recently that LaSb and LaBi also exhibit XMR, even though the rocksalt structure of these materials has inversion symmetry, and the band-structure calculations do not show a Dirac dispersion in the bulk. In this paper, we present magnetoresistance and specific-heat measurements on NdSb, which is isostructural with LaSb. NdSb has an antiferromagnetic ground state and, in analogy with the lanthanum monopnictides, is expected to be a topologically nontrivial semimetal. We show that NdSb has an XMR of ~104%, even within the antiferromagnetic state, illustrating that XMR can occur independently of the absence of time-reversal symmetry breaking in zero magnetic field. The persistence of XMR in a magnetic system offers the promise of new functionality when combining topological matter with electronic correlations. Finally, we also find that in an applied magnetic field below the Néel temperature there is a first-order transition, consistent with evidence from previous neutron scattering work.},
doi = {10.1103/PhysRevB.93.205152},
journal = {Physical Review B},
number = 20,
volume = 93,
place = {United States},
year = {Fri May 27 00:00:00 EDT 2016},
month = {Fri May 27 00:00:00 EDT 2016}
}
Web of Science
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