NaYbS2 : A planar spin- 12 triangular-lattice magnet and putative spin liquid
| Autor: | Rajib Sarkar, J. van den Brink, Michael Baenitz, Th. Doert, K. M. Ranjith, Dmytro S. Inosov, H. Yasuoka, Y. A. Onykiienko, Hans-Henning Klauss, Liviu Hozoi, J. C. Orain, Jörg Sichelschmidt, Helen Walker, Ph. Schlender, Ziba Zangeneh |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Magnetism Relaxation (NMR) Resonance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Inelastic neutron scattering Magnetization 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Hexagonal lattice Quantum spin liquid 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Physical Review B. 98 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.98.220409 |
| Popis: | Platelike high-quality ${\mathrm{NaYbS}}_{2}$ rhombohedral single crystals with lateral dimensions of a few mm have been grown and investigated in great detail by bulk methods such as magnetization and specific heat, but also by local probes such as nuclear magnetic resonance (NMR), electron-spin resonance (ESR), muon-spin relaxation ($\ensuremath{\mu}\mathrm{SR}$), and inelastic neutron scattering over a wide field and temperature range. Our single-crystal studies clearly evidence a strongly anisotropic quasi-two-dimensional magnetism and an emerging spin-orbit entangled ${J}_{\mathrm{eff}}=\frac{1}{2}$ state of Yb towards low temperatures together with an absence of long-range magnetic order down to 260 mK. In particular, the clear and narrow Yb ESR lines together with narrow $^{23}\mathrm{Na}$ NMR lines evidence an absence of inherent structural distortions in the system, which is in strong contrast to the related spin-liquid candidate ${\mathrm{YbMgGaO}}_{4}$ falling within the same space group $R\overline{3}m$. This identifies ${\mathrm{NaYbS}}_{2}$ as a rather pure spin-$\frac{1}{2}$ triangular-lattice magnet and a putative quantum spin liquid. |
| Databáze: | OpenAIRE |
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