Thermal Quenches in Spin Ice
Thermal Quenches in Spin Ice
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DOI：
10.1103/physrevlett.104.107201
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发表时间：
2010-03-12
影响因子：
8.6
通讯作者：
Sondhi, S. L.
中科院分区：
文献类型：
--
作者：
Castelnovo, C.;Moessner, R.;Sondhi, S. L.
我们研究了自旋冰从高温顺磁相淬灭到自旋冰区深处的扩散-湮灭过程，在自旋冰区中，磁单极子是稀疏的。我们发现，由于单极之间的库仑相互作用，发生了动态停滞，其中非普遍的晶格尺度约束阻碍了电荷涨落的完全衰减。这一现象超出了两组分库仑液体的传统平均场理论的范围。我们确定了动态停滞的相关时间尺度，并基于这一非平衡现象提出了一个探测自旋冰中单极子及其动力学的实验。
We study the diffusion-annihilation process which occurs when spin ice is quenched from a high temperature paramagnetic phase deep into the spin-ice regime, where the excitations-magnetic monopoles-are sparse. We find that due to the Coulomb interaction between the monopoles, a dynamical arrest occurs, in which nonuniversal lattice-scale constraints impede the complete decay of charge fluctuations. This phenomenon is outside the reach of conventional mean-field theory for a two-component Coulomb liquid. We identify the relevant time scales for the dynamical arrest and propose an experiment for detecting monopoles and their dynamics in spin ice based on this nonequilibrium phenomenon.