Magnetic anisotropy in the Kitaev model systems Na2IrO3 and RuCl3

CHALOUPKA, Jiří and Giniyat KHALIULLIN. Magnetic anisotropy in the Kitaev model systems Na2IrO3 and RuCl3. Physical Review B. College PK: The American Physical Society, 2016, vol. 94, No 6, p. nestránkováno, 11 pp. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.94.064435.

Basic information

• Original name: Magnetic anisotropy in the Kitaev model systems Na2IrO3 and RuCl3
• Name in Czech: Magnetická anizotropie kitaevovských systémů Na2IrO3 a RuCl3
• Authors: CHALOUPKA, Jiří (203 Czech Republic, guarantor, belonging to the institution) and Giniyat KHALIULLIN (643 Russian Federation).
• Edition: Physical Review B, College PK, The American Physical Society, 2016, 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: Full Text
• Impact factor: Impact factor: 3.836
• RIV identification code: RIV/00216224:14740/16:00088320
• Organization unit: Central European Institute of Technology
• Doi: http://dx.doi.org/10.1103/PhysRevB.94.064435
• UT WoS: 000383029600001
• Keywords (in Czech): spinové modely; magnetismus; iridáty; Kitaevův model
• Keywords in English: spin models; magnetism; iridates; Kitaev model
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

We study the ordered moment direction in the extended Kitaev-Heisenberg model relevant to honeycomb lattice magnets with strong spin-orbit coupling. We utilize numerical diagonalization and analyze the exact cluster ground states using a particular set of spin-coherent states, obtaining thereby quantum corrections to the magnetic anisotropy beyond conventional perturbative methods. It is found that the quantum fluctuations strongly modify the moment direction obtained at a classical level and are thus crucial for a precise quantification of the interactions. The results show that the moment direction is a sensitive probe of the model parameters in real materials. Focusing on the experimentally relevant zigzag phases of the model, we analyze the currently available neutron-diffraction and resonant x-ray-diffraction data on Na2IrO3 and RuCl3 and discuss the parameter regimes plausible in these Kitaev-Heisenberg model systems.

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