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Title: 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:
 [1];  [1];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. 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}
}

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Works referencing / citing this record:

Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb
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Anomalous quantum oscillations and evidence for a non-trivial Berry phase in SmSb
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Topological antiferromagnetic spintronics
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Fermi surface topology and magnetotransport in semimetallic LuSb
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Tunable electronic structure and topological properties of LnPn (Ln=Ce, Pr, Sm, Gd, Yb; Pn=Sb, Bi)
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Extreme magnetoresistance and SdH oscillation in compensated semimetals of NbSb 2 single crystals
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