Magnetic-Field Induced Quantum Phase Transitions in Triangular-Lattice Antiferromagnets

Authors

• T. Ono, Tokyo Institute of Technology
• H. Tanaka, Tokyo Institute of Technology
• Y. Shirata, Tokyo Institute of Technology
• A. Matsuo, University of Tokyo
• K. Kindo, University of Tokyo
• F. Ishikawa, University of Tokyo
• O. Kolomiyets, University of Tokyo
• H. Mitamura, University of Tokyo
• T. Goto, University of Tokyo
• H. Nakano, University of Hyogo
• Nathanael Alexander Fortune, Smith CollegeFollow
• Scott T. Hannahs, National High Magnetic Field Laboratory
• Y. Yoshida, University of Florida
• Y. Takano, University of Florida

Document Type

Article

Publication Date

2011

Publication Title

Journal of Physics: Conference Series

Abstract

Cs2 CuBr4 and Ba3 NiSb2 O9 are magnetically described as quasi-two-dimensional triangular-lattice antiferromagnets with spin-1 and 1, respectively. We show that both systems 2 exhibit a magnetization plateau at one-third of the saturation magnetization Ms due to the interplay of spin frustration and quantum fluctuation. In Cs2CuBr4 that has a spatially anisotropic triangular lattice, successive magnetic-field induced quantum phase transitions including a magnetization plateau 2 Ms were observed. For Ba3 NiSb2 O9 , we performed exact 3 diagonalization for rhombic spin clusters with up to 21-sites to analyze the magnetization process. The calculated results are in agreement with experimental observations.

Volume

302

Rights

Published under licence by IOP Publishing Ltd

Version

Version of Record

Recommended Citation

Ono, T.; Tanaka, H.; Shirata, Y.; Matsuo, A.; Kindo, K.; Ishikawa, F.; Kolomiyets, O.; Mitamura, H.; Goto, T.; Nakano, H.; Fortune, Nathanael Alexander; Hannahs, Scott T.; Yoshida, Y.; and Takano, Y., "Magnetic-Field Induced Quantum Phase Transitions in Triangular-Lattice Antiferromagnets" (2011). Physics: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/phy_facpubs/25