2008/02/29 by Chyh-Hong Chern
Physics and Astronomy · #Advanced Condensed Matter Physics #Artificial intelligence #Computer science #Condensed matter physics #Exponent #Phase (matter) #Phase transition #Philosophy #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Theoretical and Computational Physics #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.78.020403
published as Phys. Rev. B 78, 020403(R) (2008) · 4 pages, 6 figures
openalex publication_date 2008/07/17 · arxiv created 2008/07/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the two-dimensional superfluidity, the proliferation of the vortices and the antivortices results in a class of phase transition, the Berezinskii-Kosterlitz-Thouless (BKT) transition. This class of phase transition is also anticipated in the two-dimensional magnetic systems. However, its existence in the real magnetic systems still remains mysterious. Here we propose a phenomenological model to illustrate that the spin-freezing transition recently uncovered in the nuclear magnetic-resonance experiment on the NiGa2S4 compound is of BKT type. The spin-freezing state observed in the NiGa2S4 possesses the power-law decayed spin correlation.