Period multiplication cascade at the order-by-disorder transition in uniaxial random field XY magnets
Period multiplication cascade at the order-by-disorder transition in uniaxial random field XY magnets
复制标题
单轴随机场 XY 磁体中有序无序转变的周期倍增级联
DOI:
10.1038/s41467-020-18270-6
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发表时间:
2020
影响因子:
16.6
通讯作者:
Carlson, E. W.
中科院分区:
文献类型:
--
作者:
Basak, S.;Dahmen, K. A.;Carlson, E. W.
The addition of uniaxial random fields to the XY model induces an order-by disorder transition, in which the XY magnet develops a spontaneous magnetization in the direction perpendicular to the uniaxial random field. Here, we use simulations to explore the robustness of this phase transition with respect to a rotating driving field. We find that the order-by-disorder transition is robust, persisting to finite applied field. In the vicinity of the critical driving field strength, a time crystal emerges, in which the period of the limit cycles becomes an integermultiple of the driving period. Becauseincreases with system size, the period of the time crystal can be engineered. This period multiplication cascade is reminiscent of that occuring in amorphous solids subject to oscillatory shear near the onset of plastic deformation, and of the period bifurcation cascade near the onset of chaos in nonlinear systems, suggesting it is part of a larger class of phenomena in transitions of dynamical systems. Applications include magnets, electron nematics, and quantum gases.
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