Detuning the Honeycomb of $\alpha$-RuCl$_{3}$: Pressure-Dependent Optical Studies Reveal Broken Symmetry
| Autor: | Biesner, Tobias, Biswas, Sananda, Li, Weiwu, Saito, Yohei, Pustogow, Andrej, Altmeyer, Michaela, Wolter, Anja U. B., Büchner, Bernd, Roslova, Maria, Doert, Thomas, Winter, Stephen M., Valentí, Roser, Dressel, Martin |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 97, 220401 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.97.220401 |
| Popis: | The honeycomb Mott insulator $\alpha$-RuCl$_3$ loses its low-temperature magnetic order by pressure. We report clear evidence for a dimerized structure at $P>1$ GPa and observe the breakdown of the relativistic $j_{\rm eff}$ picture in this regime strongly affecting the electronic properties. A pressure-induced Kitaev quantum spin liquid cannot occur in this broken symmetry state. We shed light on the new phase by broad-band infrared spectroscopy of the low-temperature properties of $\alpha$-RuCl$_{3}$ and ab initio density functional theory calculations, both under hydrostatic pressure. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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