Magnetic field-tuned quantum criticality in the metallic ruthenate Sr3Ru2O7
Magnetic field-tuned quantum criticality in the metallic ruthenate Sr3Ru2O7
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DOI：
10.1126/science.1063539
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发表时间：
2001-10-12
期刊：
影响因子：
56.9
通讯作者：
Mackenzie, AP
中科院分区：
文献类型：
--
作者：
Grigera, SA;Perry, RS;Mackenzie, AP
事实证明，量子临界性的概念对于理解强相关电子的物理学至关重要。在这里，我们认为，对流动元磁体 Sr3Ru2O7 的观察代表了一类新型量子临界点的良好证据，当终止一阶跃迁的临界终点被压向零温度时，就会出现这种临界点。这本身就很有趣，而且因为有一个量子临界点（其调谐参数是磁场）很方便。讨论了由此产生的临界波动和非常接近临界场的新行为之间的关系。
The concept of quantum criticality is proving to be central to attempts to understand the physics of strongly correlated electrons. Here, we argue that observations on the itinerant metamagnet Sr3Ru2O7 represent good evidence for a new class of quantum critical point, arising when the critical end point terminating a tine of first-order transitions is depressed toward zero temperature. This is of interest both in its own right and because of the convenience of having a quantum critical point for which the tuning parameter is the magnetic field. The relationship between the resultant critical fluctuations and novel behavior very near the critical field is discussed.