تقرير
Long-range magnetic order in the ${\tilde S}=1/2$ triangular lattice antiferromagnet KCeS$_2$
| العنوان: | Long-range magnetic order in the ${\tilde S}=1/2$ triangular lattice antiferromagnet KCeS$_2$ |
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| المؤلفون: | Bastien, G., Rubrecht, B., Haeussler, E., Schlender, P., Zangeneh, Z., Avdoshenko, S., Sarkar, R., Alfonsov, A., Luther, S., Onykiienko, Y. A., Walker, H. C., Kühne, H., Grinenko, V., Guguchia, Z., Kataev, V., Klauss, H. -H., Hozoi, L., Brink, J. van den, Inosov, D. S., Büchner, B., Wolter, A. U. B., Doert, T. |
| المصدر: | SciPost Phys. 9, 041 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Recently, several putative quantum spin liquid (QSL) states were discovered in ${\tilde S} = 1/2$ rare-earth based triangular-lattice antiferromagnets (TLAF) with the delafossite structure. A way to clarify the origin of the QSL state in these systems is to identify ways to tune them from the putative QSL state towards long-range magnetic order. Here, we introduce the Ce-based TLAF KCeS$_2$ and show via low-temperature specific heat and $\mu$SR investigations that it yields magnetic order below $T_{\mathrm N} = 0.38$ K despite the same delafossite structure. We identify a well separated ${\tilde S} = 1/2$ ground state for KCeS$_2$ from inelastic neutron scattering and embedded-cluster quantum chemical calculations. Magnetization and electron spin resonance measurements on single crystals indicate a strong easy-plane $g$~factor anisotropy, in agreement with the ab initio calculations. Finally, our specific-heat studies reveal an in-plane anisotropy of the magnetic field-temperature phase diagram which may indicate anisotropic magnetic interactions in KCeS$_2$. Comment: submission to Scipost Physics |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.21468/SciPostPhys.9.3.041 |
| URL الوصول: | http://arxiv.org/abs/2005.06300 |
| رقم الأكسشن: | edsarx.2005.06300 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.21468/SciPostPhys.9.3.041 |
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