Spin liquid behaviour in Jeff=1/2 triangular lattice Ba3IrTi2O9
Tusharkanti Dey, A.V. Mahajan, P. Khuntia, M. Baenitz, B. Koteswararao, and F.C. Chou
TL;DR
This study provides evidence that Ba3IrTi2O9 exhibits quantum spin liquid behavior due to its lack of magnetic ordering down to very low temperatures despite strong magnetic interactions, highlighting its potential as a 2D triangular lattice quantum spin liquid.
Contribution
First experimental demonstration of quantum spin liquid behavior in a 5d Ir-based triangular lattice compound Ba3IrTi2O9.
Findings
No magnetic ordering down to 0.35K
Magnetic heat capacity follows a power law at low temperature
Large Curie-Weiss temperature indicating strong magnetic coupling
Abstract
Ba3IrTi2O9 crystallizes in a hexagonal structure consisting of a layered triangular arrangement of Ir4+ (Jeff=1/2). Magnetic susceptibility and heat capacity data show no magnetic ordering down to 0.35K inspite of a strong magnetic coupling as evidenced by a large Curie-Weiss temperature=-130K. The magnetic heat capacity follows a power law at low temperature. Our measurements suggest that Ba3IrTi2O9 is a 5d, Ir-based (Jeff=1/2), quantum spin liquid on a 2D triangular lattice.
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