2018/09/30 by X. M. Chen, Barry Farmer, B. Farmer +17 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Dynamics (music) #Exponential decay #Exponential function #Ising model #Lattice (music) #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Square lattice #Statistical physics #Theoretical and Computational Physics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.123.197202
published as Phys. Rev. Lett. 123, 197202 (2019) · 5 pages, 4 figures
arxiv created 2019/09/09 · openalex publication_date 2019/11/06 · arxiv updated 2019/11/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.