Kitaev-like honeycomb magnets: Global phase behavior and emergent effective models

RUSNAČKO, Juraj, Dorota GOTFRYD and Jiří CHALOUPKA. Kitaev-like honeycomb magnets: Global phase behavior and emergent effective models. Physical Review B. College PK: The American Physical Society, 2019, vol. 99, No 6, p. "064425-1"-"064425-18", 18 pp. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.99.064425.

Basic information

• Original name: Kitaev-like honeycomb magnets: Global phase behavior and emergent effective models
• Authors: RUSNAČKO, Juraj (703 Slovakia, belonging to the institution), Dorota GOTFRYD (616 Poland) and Jiří CHALOUPKA (203 Czech Republic, guarantor, belonging to the institution).
• Edition: Physical Review B, College PK, The American Physical Society, 2019, 2469-9950.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10302 Condensed matter physics
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 3.575
• RIV identification code: RIV/00216224:14310/19:00107309
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1103/PhysRevB.99.064425
• UT WoS: 000459222700012
• Keywords in English: frustrated magnetism; Kitaev model; quantum spin liquid
• Tags: TWINFUSYON
• Tags: International impact, Reviewed

Abstract

Compounds of transition metal ions with strong spin-orbit coupling recently attracted attention due to the possibility to host frustrated bond-dependent anisotropic magnetic interactions. In general, such interactions lead to complex phase diagrams that may include exotic phases, e.g., the Kitaev spin liquid. Here we report on our comprehensive analysis of the global phase diagram of the extended Kitaev-Heisenberg model relevant to honeycomb lattice compounds Na2IrO3 and alpha-RuCl3. We have utilized recently developed method based on spin coherent states that enabled us to resolve arbitrary spin patterns in the cluster ground states obtained by exact diagonalization. Global trends in the phase diagram are understood in combination with the analytical mappings of the Hamiltonian that uncover peculiar links to known models-Heisenberg, Ising, Kitaev, or compass models on the honeycomb lattice-or reveal entire manifolds of exact fluctuation-free ground states. Finally, our study can serve as a methodological example that can be applied to other spin models with complex bond-dependent non-Heisenberg interactions.

Links

• GJ15-14523Y, research and development project: Name: Mikroskopické modely magnetismu supravodivých pniktidů železa a vrstevnatých oxidů iridia
• LQ1601, research and development project: Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR

• MUNI/A/1291/2017, interní kód MU: Name: Struktura, elektronová struktura a optická odezva pokročilých materiálů VII

Investor: Masaryk University, Category A

• MUNI/A/1310/2016, interní kód MU: Name: Struktura, elektronová struktura a optická odezva pokročilých materiálů VI

Investor: Masaryk University, Category A

• 692034, interní kód MU: Name: TWINFUSYON - Twinning for Improving Capacity of Research in Multifunctional Nanosystems for Optronic Biosensing (Acronym: TWINFUSYON)

Investor: European Union, Spreading excellence and widening participation