تقرير
Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid $\alpha$-RuCl$_3$
| العنوان: | Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid $\alpha$-RuCl$_3$ |
|---|---|
| المؤلفون: | Han, Jae-Ho, Do, Seung-Hwan, Choi, Kwang-Yong, Park, Sang-Youn, Kim, Jae-You, Ji, Sungdae, Kim, Ki-Seok, Park, Jae-Hoon |
| المصدر: | npj Quantum Mater. 8, 33 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We report an unprecedented quantum criticality crossover representing two different universal scaling behaviors in a Kitaev quantum magnetic material $\alpha$-RuCl$_3$. $\alpha$-RuCl$_3$ presents both a symmetry breaking antiferromagnetic order and a long-range entangled topological order of a quantum spin liquid, and thus could be a candidate system for a new universality class involving deconfined fractionalized excitations of the local Z$_2$ fluxes and itinerant Majorana fermions. Theoretical analyses on the inelastic neutron scattering and specific heat results demonstrate that Wilson-Fisher-Yukawa-type 'conventional' weak-coupling quantum criticality in high energy scales crosses over to heavy-fermion-type 'local' strong-coupling one in low energy scales. Our findings provide deep insight on how the quantum criticality evolves in fermion-boson coupled topological systems with different types of deconfined fermions. Comment: 14 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41535-023-00563-w |
| URL الوصول: | http://arxiv.org/abs/2203.13407 |
| رقم الأكسشن: | edsarx.2203.13407 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41535-023-00563-w |
|---|