Quasi-two-dimensional Mott transition system Ca2-xSrxRuO4
Quasi-two-dimensional Mott transition system Ca2-xSrxRuO4
复制标题
DOI：
10.1103/physrevlett.84.2666
复制
发表时间：
2000-03-20
影响因子：
8.6
通讯作者：
Maeno, Y
中科院分区：
文献类型：
--
作者：
Nakatsuji, S;Maeno, Y
我们揭示了Ca_（2-x）Sr_xRuO_4的相图：连接Mott绝缘体Ca_2 RuO_4和自旋三重态超导体Sr_2 RuO_4的准二维Mott跃迁系统。在x接近或等于0.2处的金属/非金属转变附近，我们发现了一个反铁磁相关的金属区域，在该区域观察到电阻率的非费米液体行为。此外，在x（c）等于或等于0.5时，磁化率向区域边界的临界增强表明磁关联向近铁磁态的交叉，并演化为自旋三重态超导体Sr 2 RuO 4.
We have revealed the phase diagram of Ca2-xSrxRuO4: the quasi-two-dimensional Mott transition system that connects the Mott insulator Ca2RuO4 with the spin-triplet superconductor Sr2RuO4. Adjacent to the metal/nonmetal transition at x similar or equal to 0.2, we found an antiferromagnetically correlated metallic region where non-Fermi-liquid behavior in resistivity is observed. Besides this, the critical enhancement of susceptibility toward the region boundary at x(c) similar or equal to 0.5 suggests the crossover of magnetic correlation to a nearly ferromagnetic state, which evolves into the spin-triplet superconductor Sr2RuO4.