Paramagnetic Lyddane-Sachs-Teller relation

ORAL

Abstract

We describe a magnetic relation in analogy to the well-known dielectric Lyddane-Sachs-Teller relation [R. H. Lyddane et al., Phys. Rev. 59, 673 (1941)]. This magnetic relation follows directly from the model equations for nuclear induction due to fast oscillating electromagnetic fields [F. Bloch, Phys. Rev. 70, 460 (1946)] and relates the static permeability with the product over all ratios of antiresonance and resonance frequencies associated with all magnetic excitations within a given specimen. The magnetic relation differs significantly from its dielectric analog where the static properties are related to ratios of the squares of resonance frequencies. We demonstrate the validity of the magnetic Lyddane-Sachs-Teller relation using optical magnetization data from terahertz electron magnetic resonance spectroscopic ellipsometry measurements in the presence of an external magnetic field on an iron-doped semiconductor crystal of gallium nitride.

*This work is supported by the Knut and Alice Wallenberg Foundation under award No. 2024.0121, by the Swedish Foundation for Strategic Research under Grant No. EM16-0024, by the Swedish Governmental Agency for Innovation Systems VINNOVA under the Competence Center Program Grant No. 2022-03139, and by the Swedish Government Strategic Research Area NanoLund and in Materials Science on Functional Materials at Linköping University, Faculty Grant SFO Mat LiU No. 009-00971. V. D. acknowledges support by the Knut and Alice Wallenberg Foundation for a Scholar award (Grant No. 2023.0349). M. S. acknowledges support by the National Science Foundation under Awards No. ECCS 2329940 and No. OIA-2044049 Emergent Quantum Materials and Technologies (EQUATE), by Air Force Office of Scientific Research under Awards No. FA9550-19-S-0003, No. FA9550-21-1-0259, No. FA9550-23-1-0574 DEF, and FA9550-25-1-0196 and by the University of Nebraska Foundation. M. S. acknowledges support from the J. A. Woollam Foundation.

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Publication: https://doi.org/10.1103/PhysRevLett.134.086703 and https://doi.org/10.1103/PhysRevB.110.054413

Presenters

  • Mathias Schubert

    • University of Nebraska-Lincoln
    • University of Nebraska Lincoln
    • Lund Univ/Lund Inst of Tech

Authors

  • Mathias Schubert

    • University of Nebraska-Lincoln
    • University of Nebraska Lincoln
    • Lund Univ/Lund Inst of Tech

  • Viktor Rindert

    • Lund University

  • Vanya Darakchieva

    • Lund University