Magnetic resonance dynamics has been studied for a polar magnet VOSe_{2}O_{5}, which hosts several nontrivial magnetic phases including Néel-type skyrmion lattice (SkL). In both cycloidal and SkL spin states, two excitation modes active to oscillating magnetic field B_{ν}⊥c and one mode active to B_{ν}∥c are identified. The subsequent micromagnetic simulations well reproduce the observed selection rules and relative resonance frequencies, which allows the unambiguous assignment of the spin oscillation manner for each mode. Interestingly, the IC-2 phase with a potential double-q character was found to host similar excitation modes as the SkL state. We also discovered the existence of the novel B' phase with four modes active to B_{ν}⊥c. The present results provide a fundamental basis for the comprehensive understanding of resonant spin dynamics in polar magnets, and highlight VOSe_{2}O_{5} as a unique material platform to host a rich variety of nontrivial spin excitations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.133.136702 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Connection between -electron correlations and magnetic excitations in UTe.
NPJ Quantum Mater
January 2025
NIST Center for Neutron Research, Gaithersburg, MD 20899 USA.
The detailed anisotropic dispersion of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet superconductor UTe is revealed using inelastic neutron scattering. The magnetic excitations emerge from the Brillouin zone boundary at the high symmetry and points and disperse along the crystallographic -axis. In applied magnetic fields to at least = 11 T along the , the magnetism is found to be field-independent in the ( 0) plane.
View Article and Find Full Text PDFHybridization effects on the magnetic ground state of ruthenium in double perovskite LaZnRuTiO.
J Phys Condens Matter
January 2025
School of Materials Science, Indian Association for the Cultivation of Science, Calcutta 700 032, Kolkata, West Bengal, 700032, INDIA.
An exotic quantum mechanical ground state, i.e. the nonmagnetic= 0 state, has been predicted for higher transition metal tsystems, due to the influence of strong spin-orbit coupling (SOC) or in other words, due to unquenched orbital moment contribution.
View Article and Find Full Text PDFCollective modes in terahertz field response of disordered superconductors.
J Phys Condens Matter
January 2025
Department of Physics, Kent State University, 008 Smith Hall, Kent, Ohio, 44240, UNITED STATES.
We consider a problem of nonlinear response to an external electromagnetic radiation in conventional disordered superconductors which contain a small amount of weak magnetic impurities. We focus on the diffusive limit and use Usadel equation to analyze the excitation energy and dispersion relation of the collective modes. We determine the resonant frequency and dispersion of both amplitude (Schmidt-Higgs) and phase (Carlson-Goldman) modes for moderate strength of magnetic scattering.
View Article and Find Full Text PDFSimulation of Ultrafast Excited-State Dynamics in Fe(II) Complexes: Assessment of Electronic Structure Descriptions.
J Chem Theory Comput
January 2025
HUN-REN Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary.
Article Synopsis
- The study evaluates different DFT and TD-DFT methods for simulating ultrafast excited-state dynamics in Fe(II) complexes.
- The research uses time-resolved X-ray emission spectroscopy data from specific iron complexes to benchmark simulation results between metal-to-ligand charge-transfer (MLCT) and metal-centered (MC) states.
- Findings suggest that the choice of DFT/TD-DFT method significantly impacts simulation accuracy, with B3LYP* and TPSSh performing best in matching experimental dynamics.
Enhancing Reverse Intersystem Crossing in TSCT-TADF Emitters: Heavy Atom Modulation of Multiresonance Acceptors.
J Phys Chem A
January 2025
Institute of Nanoscience and Engineering, Henan University, Kaifeng, Henan 475004, China.
Article Synopsis
- The study focuses on the development of new thermally activated delayed fluorescence (TADF) materials that enhance reverse intersystem crossing (RISC) to prevent triplet-triplet annihilation.
- Five derivative molecules with different bridging atoms/groups were analyzed using computational modeling to understand their excited state behaviors in toluene.
- A unique RISC mechanism was observed, predominantly involving T states instead of the usual transitions, which has implications for designing more efficient TADF compounds.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!