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HIGH-TEMPERATURE SUPERCONDUCTIVITY FROM SHORT-RANGE REPULSION

机译：短距离排斥的高温超导

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Standard solid-state physics books offer limited help to understand much of the phenomenology of high-temperature superconductors. Almost every basic assumption behind the theories in these books fails. For example, one expects the true elementary excitations of a metal to have the same quantum numbers as free electrons, in other words one expects the so-called Fermi liquid theory to apply. That is not the case for the cuprates. One instead finds that at half-filling they are insulators and that, lightly-doped away from half-filling, their metallic state at finite temperature is not a Fermi liquid. Another tenet of solid state physics is that strong Coulomb repulsion is detrimental to superconductivity. Apparently not so for the cuprates since the superconducting transition temperature is high despite the strong Coulomb repulsion necessary to explain their insulating behavior at half-filling.
机译：标准的固态物理学书籍为了解高温超导体的许多现象提供了有限的帮助。这些书中的理论背后几乎所有基本假设都失败了。例如，人们期望金属的真实元素激发具有与自由电子相同的量子数，换句话说，人们期望应用所谓的费米液体理论。铜价并非如此。取而代之的是，人们发现它们在半填充状态下是绝缘体，并且远离半填充状态而被轻度掺杂，它们在有限温度下的金属状态不是费米液体。固态物理学的另一个原则是，强大的库仑斥力不利于超导性。显然，对于铜酸盐而言并非如此，因为尽管有足够的库仑排斥力来解释半填充时的绝缘性能，但超导转变温度却很高。

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