Bibliographic Details
| Title: |
Semiclassical approach to spin dynamics of a ferromagnetic S=1 chain |
| Authors: |
Li, Chengchen, Cui, Yi, Yu, Weiqiang, Yu, Rong |
| Source: |
Chinese Phys. B 33 (2024) 067501 |
| Publication Year: |
2024 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Strongly Correlated Electrons |
| More Details: |
Motivated by recent experimental progress in the quasi-one-dimensional quantum magnet NiNb$_2$O$_6$, we study the spin dynamics of an S=1 ferromagnetic Heisenberg chain with single-ion anisotropy by using a semiclassical molecular dynamics approach. This system undergoes a quantum phase transition from a ferromagnetic to a paramagnetic state under a transverse magnetic field, and the magnetic responses reflecting this transition is well described by our semiclassical method. We show that at low-temperature the transverse component of the dynamical structure factor depicts clearly the magnon dispersion, and the longitudinal component exhibits two continua associated with single- and two-magnon excitations, respectively. These spin excitation spectra show interesting temperature dependence as effects of magnon interactions.Our findings shed light on experimental detection of spin excitations in a large class of quasi-one-dimensional magnets. |
| Document Type: |
Working Paper |
| DOI: |
10.1088/1674-1056/ad3c32 |
| Access URL: |
http://arxiv.org/abs/2402.17416 |
| Accession Number: |
edsarx.2402.17416 |
| Database: |
arXiv |
