论文标题
磁量子限制的磁量子关键性的边缘费米液体
Marginal Fermi liquid at magnetic quantum criticality from dimensional confinement
论文作者
论文摘要
经常讨论金属量子临界性作为非弗米液体行为的来源，但受控的理论治疗却很少。在这里，我们在二维抗铁磁铁中识别并研究了新型磁性量子临界点，该抗铁磁铁耦合到传导电子的三维环境。使用无标志性量子蒙特卡洛模拟和有效的现场理论分析，我们证明了量子临界点的特征是边际费米液体行为。特别是，我们计算了跨磁层传输的电阻率，该电阻率显示出在临界时显示线性温度依赖性。讨论了近藤异质结构中的实验实现。
Metallic quantum criticality is frequently discussed as a source for non-Fermi liquid behavior, but controlled theoretical treatments are scarce. Here we identify and study a novel magnetic quantum critical point in a two-dimensional antiferromagnet coupled to a three-dimensional environment of conduction electrons. Using sign-problem-free quantum Monte Carlo simulations and an effective field-theory analysis, we demonstrate that the quantum critical point is characterized by marginal Fermi liquid behavior. In particular, we compute the electrical resistivity for transport across the magnetic layer, which is shown to display a linear temperature dependence at criticality. Experimental realizations in Kondo heterostructures are discussed.
