2008/08/11 by J. Robert, B. Canals, V. Simonet +2
Physics and Astronomy · Social Sciences · #Advanced Condensed Matter Physics #Antiferromagnetism #Art #China's Global Influence and Migration #China's Socioeconomic Reforms and Governance #Chinese history and philosophy #Condensed matter physics #Gauge theory #Humanities #Monte Carlo method #Nonlinear system #Physics #Physics of Superconductivity and Magnetism #Plane (geometry) #Political science #Quantum mechanics #Spin (aerodynamics) #Statistical physics #Structure factor #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · open access · doi:10.1103/physrevlett.101.117207
published in Physical Review Letters 101(11), 117207 (American Physical Society) · 4+ pages, 4 figures. Accepted for publication in the Physical Review Letters
arxiv created 2008/08/11 · arxiv updated 2009/12/01 · openalex publication_date 2013/03/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02
We investigate the classical spin dynamics of the kagome antiferromagnet by combining Monte Carlo and spin dynamics simulations. We show that this model has two distinct low temperature dynamical regimes, both sustaining propagative modes. The expected gauge invariance type of the low energy, low temperature, out-of-plane excitations is also evidenced in the nonlinear regime. A detailed analysis of the excitations allows us to identify ghosts in the dynamical structure factor, i.e., propagating excitations with a strongly reduced spectral weight. We argue that these dynamical extinction rules are of geometrical origin.