2007/03/31 by Shu Tanaka, Seiji Miyashita
Physics and Astronomy · #Advanced Condensed Matter Physics #Theoretical and Computational Physics #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.stat-mech
paper · pdf · doi:10.1143/jpsj.76.103001
published as J. Phys. Soc. Jpn. 76, 103001 (2007) · 4 pages, 6 figures
arxiv created 2007/09/25 · openalex publication_date 2007/09/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In the corner-sharing lattice, magnetic frustration causes macroscopic degeneracy in the ground state, which prevents systems from ordering. However, if the ensemble of the degenerate configuration has some global structure, the system can have a symmetry breaking phenomenon and thus posses a finite temperature phase transition. As a typical example of such cases, the magnetic phase transition of the Ising-like Heisenberg antiferromagnetic model on the kagome lattice has been studied. There, a phase transition of the two-dimensional ferromagnetic Ising universality class occurs accompanying with the uniform spontaneous magnetization. Because of the macroscopic degeneracy in the ordered phase, the system is found to show an entropy-driven ordering process, which is quantitatively characterized by the number of ``weathervane loop''. We investigate this novel type of slow relaxation in regularly frustrated system.