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Putative spin liquid in the triangle-based iridate Ba3IrTi2O9

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Jang,  D.-J.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Brando,  M.
Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Lee, W.-.-J., Do, S.-.-H., Yoon, S., Lee, S., Choi, Y. S., Jang, D.-J., et al. (2017). Putative spin liquid in the triangle-based iridate Ba3IrTi2O9. Physical Review B, 96(1): 014432, pp. 1-8. doi:10.1103/PhysRevB.96.014432.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-17BC-A
Abstract
We report on thermodynamic, magnetization, and muon spin relaxation measurements of the strong spin-orbit coupled iridate Ba3IrTi2O9, which constitutes a distinct frustration motif made up of a mixture of edge- and corner-sharing triangles. In spite of a strong antiferromagnetic exchange interaction of the order of 100 K, we find no hint for long-range magnetic order down to 23 mK. The magnetic specific heat data unveil T-linear and T-squared dependences at low temperatures below 1 K. At the respective temperatures, the zero-field muon spin relaxation features a persistent spin dynamics, indicative of unconventional low-energy excitations. A comparison to the 4d isostructural compound Ba3RuTi2O9 suggests that a concerted interplay of compasslike magnetic interactions and frustrated geometry promotes a dynamically fluctuating state in a triangle-based iridate.