Skip to content
DraconiticResearch
Search Sources API
186,625 studies31 sourcesUpdated 51 min ago
PreprintCC BY-NC-ND 4.0HAL

Phonon Anharmonicity induced in Bulk Sapphire by a Laminar Water Flow

  • Max Warburton
  • Philippe Bourges
  • Alexandre Ivanov
  • Laurence Noirez
Open at sourcePDFCite

Abstract

We reveal deep changes in the phonon dynamics of a sapphire crystal that occur at room temperature when the surface is simply in contact with a laminar water flow. The dynamic perturbation, identified by inelastic neutron scattering, results in a significant broadening accompanied by slight softening of the transverse Alumina acoustic phonons. This flow-induced anharmonicity propagates deep into the crystal and manifests with both light and heavy water flows, albeit with clear differences. This new effect indicating subsonic anharmonic phonon propagation complements previously identified supersonic effects revealed in another Brillouin zone of the crystal. The flow impact is of comparable in magnitude to known anharmonic effects induced by intense electric fields, temperature, or hydrostatic pressure.

Related

  1. Eigenvalues of the linearized Navier-Stokes operator near locally Couette laminar flows
    Yaniv Almog, Bernard Helffer
    arXivPreprintCC BY 4.0Full textAnalysis & PDEsMathematical physicsarXiv
  2. Foliations and Laminar Currents for C2 Maximal Plurisubharmonic Functions
    Yizhe Yang, Zhanpeng You
    arXivPreprintCC BY 4.0Full textAnalysis & PDEsarXiv
  3. Phonon Dispersion Relation in Weakly Coupled Bose Gas Beyond Bogoliubov Approximation
    Jan Dereziński, Lorenzo Pettinari
    arXivPreprintCC BY 4.0Full textMathematical physicsarXiv
  4. SCATTERING OF WATER WAVES IN PRESENCE OF A PARTIALLY IMMERSED OBSTACLE
    Debayan Maity, Vicente Ocqueteau, Marius Tucsnak
    HALPreprintPublisher termsFull textGeneral mathematicsHAL
  5. A Uniform Bound on Optimal Strategy Length in Water Transport Problem
    Tianyi Tao, Bohan Yang
    arXivPreprintarXiv licenceFull textCombinatorics & discrete mathematicsarXiv

Cite

BibTeXRIS
BibTeX
@misc{warburton2026phonon,
  title = {{Phonon Anharmonicity induced in Bulk Sapphire by a Laminar Water Flow}},
  author = {Max Warburton and Philippe Bourges and Alexandre Ivanov and Laurence Noirez},
  howpublished = {HAL},
  year = {2026},
  month = oct,
  url = {https://hal.science/hal-05798113v1},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Phonon Anharmonicity induced in Bulk Sapphire by a Laminar Water Flow
AU  - Max Warburton
AU  - Philippe Bourges
AU  - Alexandre Ivanov
AU  - Laurence Noirez
PY  - 2026
DA  - 2026/10/13
PB  - HAL
UR  - https://hal.science/hal-05798113v1
AB  - We reveal deep changes in the phonon dynamics of a sapphire crystal that occur at room temperature when the surface is simply in contact with a laminar water flow. The dynamic perturbation, identified by inelastic neutron scattering, results in a significant broadening accompanied by slight softening of the transverse Alumina acoustic phonons. This flow-induced anharmonicity propagates deep into the crystal and manifests with both light and heavy water flows, albeit with clear differences. This new effect indicating subsonic anharmonic phonon propagation complements previously identified supersonic effects revealed in another Brillouin zone of the crystal. The flow impact is of comparable in magnitude to known anharmonic effects induced by intense electric fields, temperature, or hydrostatic pressure.
ER  -