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Title: Dirac fermions in an antiferromagnetic semimetal

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/NPHYS3839· OSTI ID:1360178

Analogues of the elementary particles have been extensively searched for in condensed-matter systems for both scientific interest and technological applications. Recently, massless Dirac fermions were found to emerge as low-energy excitations in materials now known as Dirac semimetals. All of the currently known Dirac semimetals are non-magnetic with both time-reversal symmetry and inversion symmetry. Here in this paper, we show that Dirac fermions can exist in one type of antiferromagnetic system, where both and are broken but their combination is respected. We propose orthorhombic antiferromagnet CuMnAs as a candidate, analyse the robustness of the Dirac points under symmetry protections and demonstrate its distinctive bulk dispersions, as well as the corresponding surface states, by ab initio calculations. Our results provide a possible platform to study the interplay of Dirac fermion physics and magnetism.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; DMR-1305677
OSTI ID:
1360178
Journal Information:
Nature Physics, Vol. 12, Issue 12; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 195 works
Citation information provided by
Web of Science

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Cited By (41)

Concepts of antiferromagnetic spintronics journal February 2017
Route towards Dirac and Weyl antiferromagnetic spintronics: Route towards Dirac and Weyl antiferromagnetic spintronics journal March 2017
Mixed Weyl semimetals and low-dissipation magnetization control in insulators by spin–orbit torques journal November 2017
Composite topological nodal lines penetrating the Brillouin zone in orthorhombic AgF2 journal April 2019
The study of magnetic topological semimetals by first principles calculations journal October 2019
The multiple directions of antiferromagnetic spintronics journal March 2018
Topological antiferromagnetic spintronics journal March 2018
Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe journal September 2018
Experimental evidence of a new class of massless fermions journal January 2020
Topological nodal lines and nodal points in the antiferromagnetic material β-Fe 2 PO 5 journal January 2019
Gating effects in antiferromagnetic CuMnAs journal November 2019
Topological semimetal in honeycomb lattice LnSI journal September 2017
The 2017 Magnetism Roadmap journal August 2017
Two-dimensional Dirac nodal loop magnons in collinear antiferromagnets journal June 2018
Topological Weyl semimetals in the chiral antiferromagnetic materials Mn 3 Ge and Mn 3 Sn journal January 2017
Type-II Dirac point and extreme dispersion in one-dimensional plasmonic-dielectric crystals with off-axis propagation journal April 2019
Ferromagnetic nodal-line metal in monolayer h -InC journal July 2019
Magnetically controllable topological quantum phase transitions in the antiferromagnetic topological insulator MnBi 2 Te 4 journal September 2019
Large Fermi arc and robust Weyl semimetal phase in Ag 2 S journal November 2019
PT -symmetric non-Hermitian Dirac semimetals journal December 2019
Antiferromagnetic topological nodal line semimetals journal August 2017
Coupled wire models of interacting Dirac nodal superconductors journal November 2018
Symmetry-enforced Dirac points in antiferromagnetic semiconductors journal June 2019
Two-Dimensional Massless Dirac Fermions in Antiferromagnetic A Fe 2 As 2 ( A = Ba , Sr ) journal August 2017
In-plane hexagonal antiferromagnet in the Cu-Mn-As system Cu 0.82 Mn 1.18 As journal November 2019
Anomalous phase shift in a Josephson junction via an antiferromagnetic interlayer journal November 2019
Tunable Weyl and Dirac states in the nonsymmorphic compound CeSbTe journal February 2018
Intrinsic magnetic topological insulators in van der Waals layered MnBi 2 Te 4 -family materials journal June 2019
Filling-enforced Magnetic Dirac Semimetals in Two Dimensions text January 2016
Concepts of antiferromagnetic spintronics text January 2017
Topological semimetal in honeycomb lattice LnSI text January 2017
Antiferromagnetic Topological Nodal Line Semimetals text January 2017
Multiple types of topological fermions in transition metal silicides text January 2017
Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems text January 2018
Two-dimensional Dirac nodal loop magnons in collinear antiferromagnets text January 2018
Intrinsic magnetic topological insulators in van der Waals layered MnBi$_2$Te$_4$-family materials text January 2018
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Symmetry Enforced Dirac Points in Antiferromagnetic Semiconductors text January 2019
Anomalous phase shift in a Josephson junction via an antiferromagnetic interlayer text January 2019
Antiferromagnetic Topological Insulator MnBi2Te4: Synthesis and Magnetic properties text January 2019
The study of magnetic topological semimetals by first principles calculations text January 2019

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