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Emergent heat highways in the Weyl semimetal NdAlSi

Tanwar, Pardeep Kumar LU orcid ; Wadge, Ashutosh ; Yadav, Shivam ; Balodhi, Ashiwini ; Yao, Xiaohan ; Ptok, Andrzej ; Tafti, Fazel ; Wisniewski, Andrzej and Matusiak, Marcin (2025) In Physical Review B - Condensed Matter and Materials Physics 33(10).
Abstract
Magnetic Weyl semimetals have emerged as a fertile ground for exploring quantum phases of matter and quasiparticles. The latter includes unconventional fermions with larger Chern numbers than those of conventional Weyl fermions and topologically nontrivial band structures in bosonic excitations. They hold potential for further experimental exploration of emergent quantum matter, magnon-polarons, which arise from hybridization between spin and lattice degrees of freedom. Such hybridization of distinct collective modes offers a pathway to control coupled degrees of freedom as well as quantum phases. Magnon-polarons are anticipated to mark their presence in heat transport. In our findings, we observed a significant rise in magnetothermal... (More)
Magnetic Weyl semimetals have emerged as a fertile ground for exploring quantum phases of matter and quasiparticles. The latter includes unconventional fermions with larger Chern numbers than those of conventional Weyl fermions and topologically nontrivial band structures in bosonic excitations. They hold potential for further experimental exploration of emergent quantum matter, magnon-polarons, which arise from hybridization between spin and lattice degrees of freedom. Such hybridization of distinct collective modes offers a pathway to control coupled degrees of freedom as well as quantum phases. Magnon-polarons are anticipated to mark their presence in heat transport. In our findings, we observed a significant rise in magnetothermal conductivity of the Weyl semimetal NdAlSi with complex magnetic order and a ferrimagnetic ground state. Furthermore, our theoretical results predict the existence of chiral phonons with nonvanishing pseudoangular momentum. Eventually, the huge increase in magnetothermal conductivity is attributed to the hybridization or strong coupling of magnons and chiral phonons. These charge-neutral excitations can drive significant advancements in the fields of magnonics, spintronics, and emerging topological quantum computing. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B - Condensed Matter and Materials Physics
volume
33
issue
10
article number
L081107
pages
9 pages
publisher
American Physical Society
external identifiers
  • scopus:105019750596
ISSN
2469-9950
DOI
10.1103/yj5v-jvmb
language
English
LU publication?
yes
id
28f71ecb-ee14-4151-be25-8f8036654c2f
date added to LUP
2026-01-15 11:18:36
date last changed
2026-01-19 13:12:13
@article{28f71ecb-ee14-4151-be25-8f8036654c2f,
  abstract     = {{Magnetic Weyl semimetals have emerged as a fertile ground for exploring quantum phases of matter and quasiparticles. The latter includes unconventional fermions with larger Chern numbers than those of conventional Weyl fermions and topologically nontrivial band structures in bosonic excitations. They hold potential for further experimental exploration of emergent quantum matter, magnon-polarons, which arise from hybridization between spin and lattice degrees of freedom. Such hybridization of distinct collective modes offers a pathway to control coupled degrees of freedom as well as quantum phases. Magnon-polarons are anticipated to mark their presence in heat transport. In our findings, we observed a significant rise in magnetothermal conductivity of the Weyl semimetal NdAlSi with complex magnetic order and a ferrimagnetic ground state. Furthermore, our theoretical results predict the existence of chiral phonons with nonvanishing pseudoangular momentum. Eventually, the huge increase in magnetothermal conductivity is attributed to the hybridization or strong coupling of magnons and chiral phonons. These charge-neutral excitations can drive significant advancements in the fields of magnonics, spintronics, and emerging topological quantum computing.}},
  author       = {{Tanwar, Pardeep Kumar and Wadge, Ashutosh and Yadav, Shivam and Balodhi, Ashiwini and Yao, Xiaohan and Ptok, Andrzej and Tafti, Fazel and Wisniewski, Andrzej and Matusiak, Marcin}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{10}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B - Condensed Matter and Materials Physics}},
  title        = {{Emergent heat highways in the Weyl semimetal NdAlSi}},
  url          = {{http://dx.doi.org/10.1103/yj5v-jvmb}},
  doi          = {{10.1103/yj5v-jvmb}},
  volume       = {{33}},
  year         = {{2025}},
}