spin-spin coupling/ exact partition functionarbitrary-length laddersq-state Potts modelnext-nearest-neighbor spin-spin couplingsantiferromagnetic systemferromagnetic systemWe present exact calculations of partition function Z of the q-state Potts model with next-nearest-neighbor spinu2013spin couplings, both...
Modulation instability and modulated wave patterns in a nonlinear electrical transmission line with the next-nearest-neighbor coupling 2023, Chinese Journal of Physics Citation Excerpt : Investigation of the localized structures in the nonlinear fields has attracted a lot of interest. Particular attention ...
We investigate the topological phase transitions on the square-octagon lattice with an intrinsic spin-orbit coupling and an additional real next-nearest-neighbor hopping. We study the evolution of the band structure under the next-nearest-neighbor hopping parameters. Based on the spin Chern numbers,...
The previously observed transition at around T ~18 K is interpreted as a subtle change in dynamics for a minority of the spins coupling to the muon that we interpret as spins locking into clusters. The dynamics of this fraction of spins freeze below a temperature T_{SF}~8 K, while a ...
By involving a magnetic field with the Zeeman coupling, the system undergoes two phase transitions; two critical phases with different universality classes are discussed in Ref. 22. The XXZ generalization of the model (2) was defined and investigated in 13,23 . III. CHIRAL-SPIN AND ...
A variational approximation is developed for a DNLS equation with extended coupling. Solutions with trivial and nontrivial phase distribution are accurately captured. Bifurcations of several species of solutions are investigated. Simple formula to predict critical bifurcation parameter values is derived....
Electron instabilities in the Hubbard model with the next nearest neighbor coupling are calculated by exact diagonalization in finite, two-dimensional Betts cells (lattices). A viable spin and charge coherent pairing, signaled by quantum critical points and a negative charge gap region, is found in...
It is suggested that two-dimensional antiferromagnets, such as manganese formate dihydrate, may exhibit disorder points.doi:10.1139/p70-266StephensonJohnRevue Canadienne De Physique
next-nearest-neighbor couplingWe study the energy relaxation process in one-dimensional (1D) lattices with next-nearest-neighbor (NNN) couplings. This relaxation is produced by adding damping (absorbing conditions) to the boundary (free-end) of the lattice. Compared to the 1D lattices with on-...
continuum of compensation temperaturesWe investigate the magnetic properties of the mixed spin-1/2 and spin-1 Ising ferrimagnetic system with four-spin interaction J4 and next-nearest neighbor (NNN) coupling J. We perform exact ground-state calculations and use the finite cluster approximation, ...