Quantum fluctuation effects on the ordered moments in a two dimensional frustrated ferrimagnet. (18th January 2021)

• Record Type: Journal Article
• Authors: Majumdar, Kingshuk; Mahanti, Subhendra D
• Is Part Of: Journal of physics. Volume 33:Number 12(2021)
• Publication Date: 2021-01-18
• Subjects: quantum magnetism -- frustrated magnets -- ferrimagnets -- low temperature frustrated quantum spin systems -- frustration; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/abd8b6
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We propose a novel two-dimensional (2D) frustrated quantum spin-1/2 anisotropic Heisenberg model with alternating ferromagnetic and antiferromagnetic magnetic chains along one direction and antiferromagnetic interactions along the other. The (mean-field) ground state is ferrimagnetic in certain range of the interaction space. Spin-wave theory analysis of the reduction of ordered moments at inequivalent spin sites and the instability of the spin waves suggest a quantum phase transition which has the characteristics of both the frustrated 2D antiferromagnetic S = 1/2 ( J 1, J 2 ) model and 1D S 1 = 1, S 2 = 1/2 quantum ferrimagnetic model.