Energy balance and energy correction in dynamics of classical spin systems

Autor:	Garanin, Dmitry A.
Rok vydání:	2021
Předmět:	Physics - Computational Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. E 104, 055306 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.104.055306
Popis:	Energy-correction method is proposed as an addition to mainstream integrators for equations of motion of systems of classical spins. This solves the problem of non-conservation of energy in long computations and makes mainstream integrators competitive with symplectic integrators for spin systems that for different-site interactions conserve the energy explicitly. The proposed method is promising for spin systems with single-site interactions for which symplectic integrators do not conserve energy and thus have no edge against mainstream integrators. From the energy balance in the spin system with a phenomenological damping and Langevin fields, a formula for the dynamical spin temperature in the presence of single-site anisotropy is obtained. Comment: 7 PR pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2106.14689 Zobrazit plný text záznamu View this record from Arxiv