Theory of Magnetoacoustic Resonance to Probe Multipole Effects Due to a Crystal Field Quartet
arXiv:2603.16087 · doi:10.7566/JPSJ.93.114701
Abstract
We present a new method of acoustically driven resonance that probes octupole degrees of freedom as well as a quadrupole usually hidden by the magnetic properties of a crystal field quartet. A characteristic of the quadrupole is reflected in the anisotropic resonance transition rate, which depends on the propagation direction of a surface acoustic wave under an external magnetic field parallel to a typical crystallographic axis. The transition rate is modulated by the anisotropic Zeeman splitting associated with octupoles. We demonstrate how to obtain information about the quartet quadrupole-strain coupling and evaluate the anisotropic octupole effect quantitatively. We also discuss the applicability of our method to identifying a quadrupole order parameter using a multipole-multipole interaction model. For large excitation energy gaps under strong magnetic fields, we propose a photon-assisted magnetoacoustic resonance formulated on the basis of the Floquet theory.
arXiv comment13 pages, 4 figures
References in corpus (19)
- Coherent control of single spins in silicon carbide at room temperature
- Locking of electron spin coherence over fifty milliseconds in natural silicon carbide
- Quantum properties of dichroic silicon vacancies in silicon carbide
- Spin-strain interaction in nitrogen-vacancy centers in diamond
- All-optical dc nanotesla magnetometry using silicon vacancy fine structure in isotopically purified silicon carbide
- Excitation and coherent control of spin qudit modes with sub-MHz spectral resolution
- Spin and optical properties of silicon vacancies in silicon carbide (a review)
- Evidence for Octupole Order in CeLaB from Resonant X-ray Scattering
- Magnetic-Field-Induced 4f-Octupole in CeB6 Probed by Resonant X-ray Diffraction
- A theory of the electric quadrupole contribution to resonant x-ray scattering: Application to multipole ordering phases in Ce_{1-x}La_{x}B_{6}
- \emph{Ab initio} spin-strain coupling parameters of divacancy qubits in silicon carbide
- Anisotropic Spin-Acoustic Resonance in Silicon Carbide at Room Temperature
- Field-angle resolved magnetic excitations as a probe of hidden-order symmetry in CeB6
- Spectral analysis of resonant x-ray scattering in CeB6 under an external magnetic field
- Magnetoacoustic Resonance to Probe Quadrupole-Strain Coupling in a Diamond Nitrogen-Vacancy Center as a Spin-Triplet System
- Analysis of Magnetoacoustic Quadrupole Resonance and Application to Probe Quadrupole Degrees of Freedom in Quantum Magnets
- Theory of Photon-Assisted Magnetoacoustic Resonance as a New Probe of Quadrupole Dynamics
- Theory of Field-Angle-Resolved Magnetoacoustic Resonance in Spin-Triplet Systems for Application to Nitrogen-Vacancy Centers in Diamond
- Theory of Spin-Acoustic Resonance for Spin-3/2 Si Vacancy with Site Symmetry in Silicon Carbide