High-field quantum disordered state in α−RuCl3: Spin flips, bound states, and multiparticle continuum

2019/08/30 by Anuja Sahasrabudhe, A. Sahasrabudhe, David A. S. Kaib +24 · 73 citations
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Algorithm #Condensed matter physics #Diagonal #Excitation #Field (mathematics) #Geometry #Magnetic and transport properties of perovskites and related materials #Mathematics #Perovskite Materials and Applications #Physics #Quantum mechanics #Raman spectroscopy #State (computer science) #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.101.140410

published in Physical review. B./Physical review. B 101(14) (American Physical Society)

arxiv created 2019/08/30 · openalex publication_date 2020/04/24 · arxiv updated 2020/04/29 · openalex created_date 2020/05/01 · openalex updated_date 2026/08/05

Abstract

Raman and terahertz spectroscopy, combined with exact diagonalization studies, reveal the nature of the high-field phase of the proximate Kitaev material \ensuremathα-RuCl₃ as a partially polarized quantum disordered state. The state is characterized by a gapped multiparticle continuum, out of which a two-particle bound state emerges, together with a well-defined single-particle excitation at low energy. The results underline the unusual nature of the high-field phase, and the important role of Kitaev and off-diagonal interactions in \ensuremathα-RuCl₃.

Citations

• Successive magnetic phase transitions inα−RuCl3: XY-like frustrated magnet on the honeycomb lattice
• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Anyons in an exactly solved model and beyond
• Low-temperature crystal and magnetic structure ofα−RuCl3
• Unveiling magnetic interactions of ruthenium trichloride via constraining direction of orbital moments: Potential routes to realize a quantum spin liquid
• Excitations in the field-induced quantum spin liquid state of α-RuCl3
• Magnetization processes of zigzag states on the honeycomb lattice: Identifying spin models for α−RuCl3 and Na2IrO3
• Probing α-RuCl₃ Beyond Magnetic Order: Effects of Temperature and Magnetic Field
• Direct Evidence for Fermi Statistics from Proximity to the Kitaev Spin Liquid in RuCl3
• Field-induced intermediate phase in α-RuCl₃: Non-coplanar order, phase diagram, and proximate spin liquid
• Kitaev Materials

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