论文标题
三角晶格iSing磁铁中的场调整量子效应
Field-Tuned Quantum Effects in a Triangular-Lattice Ising Magnet
论文作者
论文摘要
我们报告了在纵向磁场中的三角晶格量子IS磁铁TMMGGAO 4的热力学和中子散射测量。我们的实验揭示了由量子波动引起的准柏拉图态。该状态表现出磁性和激发差距的非常规非单调场和温度依赖性。在量子波动大部分受到大量抑制的高场面状态中，尽管抑制了自旋激发强度，但我们观察到一个具有连贯的镁样激发状态的无序状态。通过详细的半古典计算，我们能够从量子波动和沮丧的Ising相互作用之间的微妙竞争中定量地理解这些行为。
We report thermodynamic and neutron scattering measurements of the triangular-lattice quantum Ising magnet TmMgGaO 4 in longitudinal magnetic fields. Our experiments reveal a quasi-plateau state induced by quantum fluctuations. This state exhibits an unconventional non-monotonic field and temperature dependence of the magnetic order and excitation gap. In the high field regime where the quantum fluctuations are largely suppressed, we observed a disordered state with coherent magnon-like excitations despite the suppression of the spin excitation intensity. Through detailed semi-classical calculations, we are able to understand these behaviors quantitatively from the subtle competition between quantum fluctuations and frustrated Ising interactions.
