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SM ISO690:2012 RESCHKE, Stephan, TSURKAN, Vladimir, DO, Seunghwan, CHOI, Kwang Yong, LUNKENHEIMER, Peter, WANG, Zhe, LOIDL, Alois. Terahertz excitations in α-RuC l3: Majorana fermions and rigid-plane shear and compression modes. In: Physical Review B, 2019, vol. 100, p. 0. ISSN 2469-9950. DOI: https://doi.org/10.1103/PhysRevB.100.100403 |
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Physical Review B | ||||||
Volumul 100 / 2019 / ISSN 2469-9950 /ISSNe 2469-9969 | ||||||
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DOI:https://doi.org/10.1103/PhysRevB.100.100403 | ||||||
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Spin liquids may host emergent quasiparticles, collective excitations of the spin degrees of freedom with characteristic features of Majorana fermions, which experimentally are detectable by broad excitation continua due to spin fractionalization. The latter is predicted for the Kitaev spin liquid, an exactly solvable model with bond-dependent interactions on a two-dimensional honeycomb lattice. Here we report on detailed terahertz experiments in α−RuCl3, identifying these characteristic fingerprints of Majorana fermions. The continuum intensity decreases and finally vanishes on increasing temperature. It partly overlaps with phonon modes, representing characteristic sliding and compression modes of the van der Waals bonded molecular layers. |
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Cuvinte-cheie Degrees of freedom (mechanics), Honeycomb structures, van der Waals forces |
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