Anomalous Behavior of the Magnetization Process of the S = 1/2 Kagome-Lattice Heisenberg Antiferromagnet at One-Third Height of the Saturation

• DOI: 10.7566/jpsj.83.104710
• Publication Date: 2014-09-29T01:00:53Z
• Authors: Hiroki Nakano; Tôru Sakai
• Keywords: Lattice (music); Heisenberg model; Saturation (graph theory)

The magnetization process of the S=1/2 Heisenberg antiferromagnet on kagome lattice is studied by numerical-diagonalization method. We successfully obtain a new result 42-site cluster in entire range. Our analysis clarifies that critical behavior around one-third height saturation different from typical well-known plateau two-dimensional systems. also examine effect $\sqrt{3}\times\sqrt{3}$-type distortion added to lattice. find at undistorted point just boundary between two phases show their own properties are each other. results suggest relationship anomalous and fact boundary.