Higgs transitions of spin ice
Higgs transitions of spin ice
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DOI：
10.1103/physrevb.84.094437
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发表时间：
2011-09-22
影响因子：
3.7
通讯作者：
Powell, Stephen
中科院分区：
文献类型：
--
作者：
Powell, Stephen
像自旋冰这样的受抑磁体表现出库仑相，其中相关性在长距离处具有幂律形式。应用微扰可以引起有序跃迁，这不能用通常的朗道范式来描述，而是自然地被视为涌现规范理论的希格斯跃迁。从自旋冰的经典统计模型出发，证明了这种方法可以描述各种可能的相和转变。某些情况下，确定连续过渡被认为是可能的，预测的临界行为可能会在实验或数值模拟测试。
Frustrated magnets such as spin ice exhibit Coulomb phases, where correlations have power-law forms at long distances. Applied perturbations can cause ordering transitions which cannot be described by the usual Landau paradigm and are instead naturally viewed as Higgs transitions of an emergent gauge theory. Starting from a classical statistical model of spin ice, it is shown that a variety of possible phases and transitions can be described by this approach. Certain cases are identified where continuous transitions are argued to be likely; the predicted critical behavior may be tested in experiments or numerical simulations.