Quantum spin fluctuations and the stability of atomically-sized Bloch points

Autor:	Tapia, Alonso, Saji, Carlos, Roldan, Alejandro, Nunez, Alvaro S.
Rok vydání:	2023
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We reveal the role of the spin variables' zero-point fluctuations (ZPFs) on the stability of Bloch point (BP) singularities. As topological solitons, BPs are important in topological transitions in nanomagnets. BPs present a singularity at their core, where the long-length-scale approximation fails. We found that ZPFs bloom nearby this core, reducing the effective magnetic moment and increasing the BP's stability. As suggested by classical models, the magnonic eigenmodes found by our methods fit with the bound state of an electron surrounding a dyon, with a magnetic and an electric charge. Comment: Main: 5 pages, 4 figures. Supplementary material: 3 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.18704 Zobrazit plný text záznamu View this record from Arxiv