Novel Field Induced Quantum Phase Transition of the Kagome Lattice Antiferromagnet

27th International Conference on Low Temperature Physics

Sakai, Tôru^1,2 ; Nakano, Hiroki^2

Japan Atomic Energy Agency, SPring-8, Sayo, Hyogo

679-5148, Japan^1

Graduate School of Material Science, University of Hyogo, Kamigori

678-1297, Japan^2

关键词: Antiferromagnets;    Diagonalizations;    Finite size scaling;    Kagome lattice;    Magnetization behavior;    Magnetization curves;    Quantum phase transitions;    Unconventional features;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/4/042025/pdf
DOI  :  10.1088/1742-6596/568/4/042025

来源: IOP

【 摘 要 】

The S 1/2 kagomelattice antiferromagnet is investigated by the numerical diagonalization. We successfully obtained the ground-state full magnetization curve for the 42-spin cluster. Based on the finite-size scaling alnalysis including this new result, we consider the quatnum critical magnetization behavior around the 1/3 of the saturation magnetization. As a result, some unconventional features of the 1/3 magnetization ramp, which was proposed by our previous work, are clarified.