2019/12/31 by Yusuke Masaki · 10 citations
Physics and Astronomy · #Condensed matter physics #Excitation #Interpretation (philosophy) #Magnet #Magnetic field #Magnetic properties of thin films #Nonlinear system #Phase (matter) #Phase diagram #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Soliton #Theoretical and Computational Physics #cond-mat.stat-mech #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.101.214424
published in Physical review. B./Physical review. B 101(21) (American Physical Society) · 26 pages, 19 figures
openalex publication_date 2020/06/15 · arxiv created 2020/06/16 · arxiv updated 2020/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We thoroughly study the zero temperature properties of monoaxial chiral spin systems under a tilted magnetic field. The magnetic phase diagram includes two kinds of continuous phase transitions and one discontinuous phase transition. We clarify the properties of the phase transition in terms of the helical wave picture and the particle (soliton) picture and also in terms of the interaction between solitons. The interacting-soliton picture properly describes most of the discontinuous phase transition. In addition, we investigate several instabilities of the modulated structures such as an isolated soliton and the surface modulation, since their instabilities should be important to the changes of the magnetic properties. For this purpose, we perform the analyses based on the energy landscape as well as the excitation spectrum; the former approach gives an intuitive interpretation. We clarify the mechanisms of the instabilities through these analyses and draw the stability lines of solitons in the magnetic phase diagram.