Phonon softening and electron-phonon coupling in the topological nodal-line semimetal ZrGeSe

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dc.contributor.authorZhao, WYen_AU
dc.contributor.authorHaque, Een_AU
dc.contributor.authorGuo, Len_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorChen, Len_AU
dc.contributor.authorSalmankurt, Ben_AU
dc.contributor.authorWang, XLen_AU
dc.contributor.authorZheng, RKen_AU
dc.contributor.authorMedhekar, NVen_AU
dc.contributor.authorKarel, Jen_AU
dc.contributor.authorRule, KCen_AU
dc.date.accessioned2025-09-19T04:30:30Zen_AU
dc.date.available2025-09-19T04:30:30Zen_AU
dc.date.issued2024-03-07en_AU
dc.date.statistics2025-08-27en_AU
dc.description.abstractZrGeSe is one of the most well-known topological nodal-line semimetals, which possesses linearly dispersive electronic bands near the Fermi surface. However, the lattice-dynamics study and its interaction with the electronic system have not been investigated. We employed the inelastic neutron-scattering method to study the lattice dynamics of ZrGeSe single crystals. The measured acoustic phonon dispersions were compared with lattice-dynamics calculations, with an overall good agreement with theory; however, both the longitudinal and the transverse acoustic phonon dispersions along the (𝑞⁢00) directions demonstrate significant softening, unexpectedly in contrast with the theoretical predictions. Complementary ab initio molecular dynamics simulations indicate an anomalous temperature dependency in the vibrational spectroscopy. We show that strong electron-phonon coupling exists along the Γ-𝑀 −𝑋 directions and argue that the phonon softening is induced by such electron-phonon coupling. ©2025 American Physical Society.en_AU
dc.identifier.articlenumber034201en_AU
dc.identifier.citationZhao, W., Haque, E., Guo, L., Cortie, D., Chen, L., Salmankurt, B., Wang, X., Zheng, R.-K., Medhekar, N. V., Karel, J., & Rule, K. C. (2024). Phonon softening and electron-phonon coupling in the topological nodal-line semimetal ZrGeSe. Physical Review Materials, 8(3), 034201. doi:10.1103/PhysRevMaterials.8.034201en_AU
dc.identifier.issn2476-0455en_AU
dc.identifier.issn2475-9953en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitlePhysical Review Materialsen_AU
dc.identifier.urihttps://doi.org/10.1103/physrevmaterials.8.034201en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16516en_AU
dc.identifier.volume8en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectZirconiumen_AU
dc.subjectGermaniumen_AU
dc.subjectSeleniumen_AU
dc.subjectPhononsen_AU
dc.subjectElectronsen_AU
dc.subjectCrystalsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectSpectroscopyen_AU
dc.subjectSemimetalsen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectPhononsen_AU
dc.subjectCouplingen_AU
dc.titlePhonon softening and electron-phonon coupling in the topological nodal-line semimetal ZrGeSeen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2024-02-08en_AU
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