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Full-Text Articles in Physics
Evolution Of Magnetism In The Single-Crystal Honeycomb Iridates (Na1−XLiX)2Iro3, Gang Cao, Tongfei Qi, L. Li, Jsaminka Terzic, Vincent Shian Cao, Shujuan Yuan, M. Tovar, Ganpathy Murthy, Ribhu K. Kaul
Evolution Of Magnetism In The Single-Crystal Honeycomb Iridates (Na1−XLiX)2Iro3, Gang Cao, Tongfei Qi, L. Li, Jsaminka Terzic, Vincent Shian Cao, Shujuan Yuan, M. Tovar, Ganpathy Murthy, Ribhu K. Kaul
Physics and Astronomy Faculty Publications
We report the successful synthesis of single crystals of the layered iridate (Na1−xLix)2IrO3, 0 ≤ x ≤ 0.9, and a thorough study of its structural, magnetic, thermal, and transport properties. This compound allows a controlled interpolation between Na2IrO3 and Li2IrO3, while maintaining the quantum magnetism of the honeycomb Ir4+ planes. The measured phase diagram demonstrates a suppression of the Néel temperature TN at an intermediate x, indicating that the magnetic orders in Na2IrO3 and Li2IrO3 …
Tuning The JEff = 1/2 Insulating State Via Electron Doping And Pressure In The Double-Layered Iridate Sr3Ir2O7, L. Li, P. P. Kong, Tongfei Qi, C. Q. Jin, Shujuan Yuan, Lance E. Delong, P. Schlottmann, Gang Cao
Tuning The JEff = 1/2 Insulating State Via Electron Doping And Pressure In The Double-Layered Iridate Sr3Ir2O7, L. Li, P. P. Kong, Tongfei Qi, C. Q. Jin, Shujuan Yuan, Lance E. Delong, P. Schlottmann, Gang Cao
Physics and Astronomy Faculty Publications
Sr3Ir2O7 exhibits a novel Jeff = 1/2 insulating state that features a splitting between Jeff = 1/2 and 3/2 bands due to spin-orbit interaction. We report a metal-insulator transition in Sr3Ir2O7 via either dilute electron doping (La3+ for Sr2+) or application of high pressure up to 35 GPa. Our study of single-crystal Sr3Ir2O7 and (Sr1−xLax)3Ir2O7 reveals that application of high hydrostatic pressure P leads to a drastic reduction in the electrical resistivity by as much …
Spin Switching And Magnetization Reversal In Single-Crystal Ndfeo3, Shujuan Yuan, W. Ren, F. Hong, Y. B. Wang, J. C. Zhang, L. Bellaiche, Gang Cao
Spin Switching And Magnetization Reversal In Single-Crystal Ndfeo3, Shujuan Yuan, W. Ren, F. Hong, Y. B. Wang, J. C. Zhang, L. Bellaiche, Gang Cao
Physics and Astronomy Faculty Publications
We report an experimental and computational study of single-crystal NdFeO3, which features two inequivalent magnetic sublattices, namely, Fe and Nd sublattices that are coupled in an antiparallel fashion. This paper reveals that a strong interaction between 3d and 4f electrons of the two sublattices along with a spin-lattice coupling drives an extremely interesting magnetic state that is highly sensitive to the orientation and history of weak magnetic field. The following phenomena are particularly remarkable: (1) sharply contrasting magnetization M(T) along the a and c axes; (2) a first-order spin switching along the a …