%0 Journal Article %1 PhysRevB.100.224417 %A Ranjith, K. M. %A Luther, S. %A Reimann, T. %A Schmidt, B. %A Schlender, Ph. %A Sichelschmidt, J. %A Yasuoka, H. %A Strydom, A. M. %A Skourski, Y. %A Wosnitza, J. %A Kühne, H. %A Doert, Th. %A Baenitz, M. %D 2019 %I American Physical Society %J Phys. Rev. B %K d %N 22 %P 224417 %R 10.1103/PhysRevB.100.224417 %T Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe$_2$ %U https://link.aps.org/doi/10.1103/PhysRevB.100.224417 %V 100 %X High-quality single crystals of $NaYbSe_2$, which resembles a perfect triangular-lattice antiferromagnet without intrinsic disorder, are investigated by magnetization and specific heat, as well as the local probe techniques nuclear magnetic resonance (NMR) and electron spin resonance. The low-field measurements confirm the absence of any spin freezing or long-range magnetic order down to 50 mK, which suggests a quantum spin liquid ground (QSL) state with gapless excitations. Instability of the QSL state is observed upon applying magnetic fields. For the H⊥c direction, a field-induced magnetic phase transition is observed above 2 T from the Cp(T) data, agreeing with a clear Ms3 plateau of M(H), which is associated with an up-up-down spin arrangement. For the H∥c direction, a field-induced transition could be evidenced at a much higher field range (9–21 T). The 23Na NMR measurements provide microscopic evidence of field-induced ordering for both directions. A reentrant behavior of TN, originating from the thermal and quantum spin fluctuations, is observed for both directions. The anisotropic exchange interactions J⊥≃4.7 K and Jz≃2.33 K are extracted from the modified bond-dependent XXZ model for the spin-12 triangular-lattice antiferromagnet. The absence of magnetic long-range order at zero fields is assigned to the effect of strong bond frustration, arising from the complex spin-orbit entangled 4f ground state. Finally, we derive the highly anisotropic magnetic phase diagram, which is discussed in comparison with the existing theoretical models for spin-12 triangular-lattice antiferromagnets.

@article{PhysRevB.100.224417, abstract = {High-quality single crystals of $NaYbSe_2$, which resembles a perfect triangular-lattice antiferromagnet without intrinsic disorder, are investigated by magnetization and specific heat, as well as the local probe techniques nuclear magnetic resonance (NMR) and electron spin resonance. The low-field measurements confirm the absence of any spin freezing or long-range magnetic order down to 50 mK, which suggests a quantum spin liquid ground (QSL) state with gapless excitations. Instability of the QSL state is observed upon applying magnetic fields. For the H⊥c direction, a field-induced magnetic phase transition is observed above 2 T from the Cp(T) data, agreeing with a clear Ms3 plateau of M(H), which is associated with an up-up-down spin arrangement. For the H∥c direction, a field-induced transition could be evidenced at a much higher field range (9–21 T). The 23Na NMR measurements provide microscopic evidence of field-induced ordering for both directions. A reentrant behavior of TN, originating from the thermal and quantum spin fluctuations, is observed for both directions. The anisotropic exchange interactions J⊥≃4.7 K and Jz≃2.33 K are extracted from the modified bond-dependent XXZ model for the spin-12 triangular-lattice antiferromagnet. The absence of magnetic long-range order at zero fields is assigned to the effect of strong bond frustration, arising from the complex spin-orbit entangled 4f ground state. Finally, we derive the highly anisotropic magnetic phase diagram, which is discussed in comparison with the existing theoretical models for spin-12 triangular-lattice antiferromagnets.}, added-at = {2021-10-14T15:17:22.000+0200}, author = {Ranjith, K. M. and Luther, S. and Reimann, T. and Schmidt, B. and Schlender, Ph. and Sichelschmidt, J. and Yasuoka, H. and Strydom, A. M. and Skourski, Y. and Wosnitza, J. and K\"uhne, H. and Doert, Th. and Baenitz, M.}, biburl = {https://www.bibsonomy.org/bibtex/23333edcc62c1cfec212880c022d6e514/ctqmat}, day = 19, description = {Phys. Rev. B 100, 224417 (2019) - Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid ${\mathrm{NaYbSe}}_{2}$}, doi = {10.1103/PhysRevB.100.224417}, interhash = {a844a018dc910a252cf8673ac6d81640}, intrahash = {3333edcc62c1cfec212880c022d6e514}, journal = {Phys. Rev. B}, keywords = {d}, month = dec, number = 22, numpages = {11}, pages = 224417, publisher = {American Physical Society}, timestamp = {2023-10-20T10:00:07.000+0200}, title = {Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe$_{\mathbf{2}}$}, url = {https://link.aps.org/doi/10.1103/PhysRevB.100.224417}, volume = 100, year = 2019 }