التفاصيل البيبلوغرافية
| العنوان: |
Sweet spot in the RuCl$_3$ magnetic system: nearly ideal $j_{\mathrm{eff}}\!=\!1/2$ moments and maximized $K/J$ ratio under pressure |
| المؤلفون: |
Bhattacharyya, Pritam, Hozoi, Liviu, Stahl, Quirin, Geck, Jochen, Bogdanov, Nikolay A. |
| المصدر: |
Phys. Rev. B 108, L161107 (2023) |
| سنة النشر: |
2023 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Strongly Correlated Electrons |
| الوصف: |
Maximizing the ratio between Kitaev and residual Heisenberg interactions is a major goal in nowadays research on Kitaev-Heisenberg quantum magnets. Here we investigate Kitaev-Heisenberg exchange in a recently discovered crystalline phase of RuCl$_3$ under presure -- it displays unusually high symmetry, with only one type of Ru-Ru links, and uniform Ru-Cl-Ru bond angles of $\approx$93$^{\circ}$. By quantum chemical calculations in this particular honeycomb-lattice setting we find a very small $J$, which yields a $K/J$ ratio as large as $\sim$100. Interestingly, we also find that this is associated with vanishingly small $d$-shell trigonal splittings, i.\,e., minimal departure from ideal $j_{\mathrm{eff}}\!=\!1/2$ moments. This reconfirms RuCl$_3$ as a most promising platform for materializing the much sought-after Kitaev spin-liquid phase and stimulates further experiments under strain and pressure. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevB.108.L161107 |
| URL الوصول: |
http://arxiv.org/abs/2302.00540 |
| رقم الانضمام: |
edsarx.2302.00540 |
| قاعدة البيانات: |
arXiv |