5 papers
Competing ferromagnetic and antiferromagnetic phases on the frustrated Ising honeycomb lattice
Pietro F. Dias, Fabio M. Zimmer, Nikolaos G. Fytas +1
We investigate the frustrated -- Ising model on the honeycomb lattice, featuring first- and second-neighbor ferromagnetic couplings ( and ) and third-n…
Spin-singlet dimer phase in a frustrated square lattice under a magnetic field
L. M. Ramos, M. Schmidt, F. M. Zimmer
We investigated the isotropic spin-1/2 Heisenberg model on an anisotropic square lattice with competing exchange interactions, motivated by the unconventional magnetic behavior obs…
The correlated cluster mean-field approach to the frustrated Ising model on the honeycomb lattice
Carlos H. D. Batista, M. Schmidt, F. M. Zimmer
We study the - Ising model on the honeycomb lattice, considering ferromagnetic interactions between first neighbors () and antiferromagnetic interactions between sec…
Decorated Clusters and Geometrical Frustration in Cluster Spin Glass: A Random Graph Approach
S. G. Magalhaes, F. M. Zimmer, R. Erichsen
We develop a theory to investigate how geometrically frustrated clusters that become decorated affect the Cluster Spin Glass phase. The cluster structure is assumed to be a tetrahe…
Interplay of frustration and quantum fluctuations in a spin-1/2 anisotropic square lattice
L. M. Ramos, F. M. Zimmer, M. Schmidt
Motivated by theoretical and experimental studies reported by Yamaguchi et al. (Phys. Rev. B 98, 094402 (2018)), we performed a cluster mean-field analysis of an anisotropic Heisen…