An axial next-nearest-neighbor Ising model is studied by using the nonequilibrium relaxation method. We find that the incommensurate stripe phase between the ordered phase and the paramagnetic phase is negligibly narrow or may vanish in the thermodynamic limit. The phase transition is the second-...
We present a muon-spin relaxation investigation of the Ising chain magnet Ca_{3}Co_{2-x}Mn_{x}O_{6} (x~0.95). We find dynamic spin fluctuations persisting down to the lowest measured temperature of 1.6 K. The previously observed transition at around T ~1
The dynamics of this spin fraction freeze below a temperature T SF ≈ 8 K , while a majority of spins continue to fluctuate. An explanation of the low-temperature behavior is suggested in terms of the predictions of the anisotropic next-nearest-neighbor Ising model. 展开 ...
We investigate a fully frustrated XY model with nearest-neighbor (NN) and next-nearest-neighbor (NNN) couplings which can be realized in Josephson junction arrays. We study the phase diagram for 0<=x<=1 (x is the ratio between NNN and NN couplings). When x<1/2 an Ising transition and...
4. Partially Disordered Phases of the Axial Next-Nearest-Neighbor Ising Model with Alternating Intra- and Inter-layer Interactions [C] . T. Kasama, Y. Muraoka, T. Iwashita, International Conference on Low Temperature Physics . 2005 机译:轴向下一邻邻近阶段的部分紊乱的相位具有交替的层内相互...
More Exact Results on a Binary Alloy with Next Nearest Neighbor Competing Interactionsquantum dotsCoulomb blockadecorrelationWe study an Ising-type binary alloy with competing interactions between first and second neighbors on a Bethe lattice. Successive layers of the Bethe lattice are occupied in ...
We study phase transitions and thermodynamic properties in the two-dimensional antiferromagnetic Ising model with next-nearest-neighbor interaction on a Kagomé lattice by Monte Carlo simulations. A histogram data analysis shows that a second-order transition occurs in the model. From the analysis of ...
摘要: 22pQH-5 Nature of Anomalous Fluctuations in the Ordered State of the Pyrochlore Heisenberg Antiferromagnet with the Ferromagnetic Next-Nearest-Neighbor Interaction NGUYEN Trung Hai , KAWAMURA Hikaru Meeting abstracts of the Physical Society of Japan 63(2-3), 424, 2008-08-25...
The effect of the three-spin interaction and the next-nearest neighbor interaction on the quenching dynamics of a transverse Ising model We also study the effect of ferromagnetic or antiferromagnetic next nearest neighbor (NNN) interactions on the dynamics of TIM under the same quenching ... U Di...
A one-dimensional quantum Hamiltonian which is equivalent to the twodimensional axial next-nearest-neighbor Ising (ANNNI) model is studied through the derivation and analysis of weak- and strong-coupling perturbation expansions. The phase diagram is constructed and the nature of the phase transitions...