Anderson P W
Science. 1987 Mar 6;235(4793):1196-8. doi: 10.1126/science.235.4793.1196.
The oxide superconductors, particularly those recently discovered that are based on La(2)CuO(4), have a set of peculiarities that suggest a common, unique mechanism: they tend in every case to occur near a metal-insulator transition into an odd-electron insulator with peculiar magnetic properties. This insulating phase is proposed to be the long-sought "resonating-valence-bond" state or "quantum spin liquid" hypothesized in 1973. This insulating magnetic phase is favored by low spin, low dimensionality, and magnetic frustration. The preexisting magnetic singlet pairs of the insulating state become charged superconducting pairs when the insulator is doped sufficiently strongly. The mechanism for superconductivity is hence predominantly electronic and magnetic, although weak phonon interactions may favor the state. Many unusual properties are predicted, especially of the insulating state.
氧化物超导体，尤其是最近发现的基于La(2)CuO(4)的那些超导体，具有一系列特性，这些特性暗示了一种共同的、独特的机制：在每种情况下，它们往往出现在金属 - 绝缘体转变附近，转变为具有特殊磁性的奇数电子绝缘体。这种绝缘相被认为是1973年假设的长期寻找的“共振价键”态或“量子自旋液体”。这种绝缘磁相受低自旋、低维度和磁阻挫的青睐。当绝缘体被充分强地掺杂时，绝缘态预先存在的磁单重态对会变成带电的超导对。因此，超导机制主要是电子和磁性的，尽管弱声子相互作用可能有利于这种状态。预测了许多不寻常的特性，尤其是绝缘态的特性。
