Laboratoire de Physique des Solides, Universite Paris-Sud 11, CNRS UMR 8502, 91405 Orsay, France.
Phys Rev Lett. 2010 Jun 25;104(25):256402. doi: 10.1103/PhysRevLett.104.256402. Epub 2010 Jun 23.
We report a NMR and magnetometry study on the expanded intercalated fulleride Cs3C60 in both its A15 and face centered cubic structures. NMR allowed us to evidence that both exhibit a first-order Mott transition to a superconducting state, occurring at distinct critical pressures p{c} and temperatures T{c}. Though the ground state magnetism of the Mott phases differs, their high T paramagnetic and superconducting properties are found similar, and the phase diagrams versus unit volume per C60 are superimposed. Thus, as expected for a strongly correlated system, the interball distance is the relevant parameter driving the electronic behavior and quantum transitions of these systems.
我们报告了扩展插层富勒烯 Cs3C60 在 A15 和面心立方结构中的 NMR 和磁强计研究。NMR 使我们能够证明这两种结构都经历了一级莫特转变到超导态，发生在不同的临界压力 pc 和温度 Tc。尽管莫特相的基态磁性质不同，但它们的高 T 顺磁和超导性质被发现是相似的，并且相对于每个 C60 的单位体积的相图是叠加的。因此，正如预期的那样，对于强关联系统，球间距离是驱动这些系统电子行为和量子跃迁的相关参数。
