CHALOUPKA, Jiří, George JACKELI and Giniyat KHALIULLIN. Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A2IrO3. Physical Review Letters, USA: The Americal Physical Society, 2010, vol. 105, No 2, p. 027204-1 - 027204-4. ISSN 0031-9007.
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Basic information
Original name Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A2IrO3
Authors CHALOUPKA, Jiří (203 Czech Republic, guarantor), George JACKELI (268 Georgia) and Giniyat KHALIULLIN (643 Russian Federation).
Edition Physical Review Letters, USA, The Americal Physical Society, 2010, 0031-9007.
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: 7.622
RIV identification code RIV/00216224:14310/10:00044328
Organization unit Faculty of Science
UT WoS 000279697900005
Keywords in English magnetic order; spin systems; iridates
Tags International impact, Reviewed
Changed by Changed by: Mgr. Jiří Chaloupka, Ph.D., učo 53310. Changed: 10/11/2010 17:41.
Abstract
We derive and study a spin one-half Hamiltonian on a honeycomb lattice describing the exchange interactions between Ir4+ ions in a family of layered iridates A2IrO3 (A=Li,Na). Depending on the microscopic parameters, the Hamiltonian interpolates between the Heisenberg and exactly solvable Kitaev models. Exact diagonalization and a complementary spin-wave analysis reveal the presence of an extended spin-liquid phase near the Kitaev limit and a conventional Néel state close to the Heisenberg limit. The two phases are separated by an unusual stripy antiferromagnetic state, which is the exact ground state of the model at the midpoint between two limits.
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MSM0021622410, plan (intention)Name: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur
Investor: Ministry of Education, Youth and Sports of the CR, Research Intents
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