Eightfold degenerate Dirac nodal line in the collinear antiferromagnet Mn5Si3
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00618592" target="_blank" >RIV/68378271:_____/25:00618592 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.111.085147" target="_blank" >https://doi.org/10.1103/PhysRevB.111.085147</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.111.085147" target="_blank" >10.1103/PhysRevB.111.085147</a>
Alternative languages
Result language
angličtina
Original language name
Eightfold degenerate Dirac nodal line in the collinear antiferromagnet Mn5Si3
Original language description
We study the electronic, magnetic, and spin-transport properties of the orthorhombic Mn5Si3 compound in the AF2 phase using symmetry analysis and ab initio calculations. Our ground-state energy calculations align with experimental observations, demonstrating that the collinear antiferromagnetic (AFM) order, with the Néel vector in the [010] direction, is the most stable magnetic configuration both with and without spin-orbit coupling (SOC) in bulk lattice geometry. We identified an unconventional eightfold degenerate Dirac nodal line (DNL) close to the Fermi level, characterized by negligible SOC. This DNL is robustly protected by a unique combination of pure-spin and lattice symmetries together with magnetic space-group (MSG) symmetries. Upon introducing SOC, this degeneracy is reduced to two fourfold DNLs, being protected by the combination of time-reversal, partial translation, and nonsymmorphic symmetries within the MSG. We also predict a large intrinsic spin Hall conductivity which correlates with the presence of SOC-induced splitting of these eightfold degenerate DNLs near the Fermi level. These intriguing characteristics position the collinear AFM Mn5Si3 as a compelling candidate for spintronic applications, particularly in the generation and detection of spin currents, while remaining compatible with modern silicon technology.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
111
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
085147
UT code for WoS article
001448475300002
EID of the result in the Scopus database
2-s2.0-85218634738