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PreprintarXiv licencearXiv

Layer Axial Phonons and Dipolar Thermal Response in Centrosymmetric Thin Films

  • Madhubanti Mukherjee
  • Kapil Gope
  • Barun Ghosh
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Abstract

In nonmagnetic centrosymmetric materials, 𝒫𝒯 symmetry enforces vanishing total phonon angular momentum (phonon AM) at every wave vector, making them appear unsuitable as hosts of axial phonons. Here, using first-principles calculations for BaAgAs and representative van der Waal's layered materials, we show that centrosymmetric slabs can still host large hidden layer-resolved phonon AM with both chiral and cycloidal modes. This hidden phonon AM texture produces layer resolved phonon thermal Edelstein-like responses and a real-space phonon AM dipole response, both tunable by strain. Our results establish centrosymmetric layered materials as an exciting platform for hidden axial phonon and multipolar phonon thermal response.

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Cite

BibTeXRIS
BibTeX
@misc{mukherjee2026layer,
  title = {{Layer Axial Phonons and Dipolar Thermal Response in Centrosymmetric Thin Films}},
  author = {Madhubanti Mukherjee and Kapil Gope and Barun Ghosh},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.30600},
  eprint = {2608.30600},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.30600},
}
RIS
TY  - UNPB
TI  - Layer Axial Phonons and Dipolar Thermal Response in Centrosymmetric Thin Films
AU  - Madhubanti Mukherjee
AU  - Kapil Gope
AU  - Barun Ghosh
PY  - 2026
DA  - 2026/08/31
PB  - arXiv
DO  - 10.48550/arxiv.2608.30600
UR  - https://arxiv.org/abs/2608.30600
AB  - In nonmagnetic centrosymmetric materials, 𝒫𝒯 symmetry enforces vanishing total phonon angular momentum (phonon AM) at every wave vector, making them appear unsuitable as hosts of axial phonons. Here, using first-principles calculations for BaAgAs and representative van der Waal's layered materials, we show that centrosymmetric slabs can still host large hidden layer-resolved phonon AM with both chiral and cycloidal modes. This hidden phonon AM texture produces layer resolved phonon thermal Edelstein-like responses and a real-space phonon AM dipole response, both tunable by strain. Our results establish centrosymmetric layered materials as an exciting platform for hidden axial phonon and multipolar phonon thermal response.
ER  -