Lattice dynamics in the double-helix antiferromagnet FeP

• DOI: 10.1103/physrevresearch.2.043405
• Publication Date: 2020-12-22T15:44:33Z
• Authors: A. S. Sukhanov; S. E. Nikitin; M. S. Pavlovskii; T. C. Sterling; N. D. Andryushin; A. S. Cameron; Y. V. Tymoshenko; H. C. Walker; I. V. Morozov; I. O. Chernyavskii; S. Aswartham; D. Reznik; D. S. Inosov
• Keywords: Brillouin zone; Lattice (music)

We present a comprehensive investigation of lattice dynamics in the double-helix antiferromagnet FeP by means high-resolution time-of-flight neutron spectroscopy and ab initio calculations. Phonons can hybridize with magnetic excitations noncollinear magnets to significantly influence their properties. observed rich spectrum phonon excitations, which extends up ∼50 meV. performed detailed analysis calculated spectra for all high-symmetry points directions Brillouin zone. show that DFT calculations quantitatively capture essential features phonons, including both dispersions scattering intensities. By making use intensity comparison between theory data, we were able identify displacement vectors majority modes. The overall excellent agreement predictions experimental results breaks down lowest mode at Y point, whose energy is lower than ∼13%. study provides vital information on demonstrates applicability novel pressure-induced phenomena related materials, such as MnP CrAs.7 MoreReceived 14 September 2020Accepted 12 November 2020DOI:https://doi.org/10.1103/PhysRevResearch.2.043405Published American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI. Open access publication funded Max Planck Society.Published SocietyPhysics Subject Headings (PhySH)Research AreasLattice dynamicsPhononsPhysical SystemsNoncollinear magnetsTechniquesDensity functional calculationsInelastic scatteringCondensed Matter, Materials & Applied Physics