Spin density wave and superconductivity in café_<1-x>Co_x AsF studied by nuclear magnetic resonance
Spin density wave and superconductivity in café_<1-x>Co_x AsF studied by nuclear magnetic resonance
复制标题
核磁共振研究café_<1-x>Co_x AsF中的自旋密度波与超导
DOI：
10.1103/physrevb.86.060515
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and H. Hosono
中科院分区：
文献类型：
--
作者：
S. Tsutsumi;N. Fujiwara;S. Matsuishi;and H. Hosono
我们进行了核磁共振测量，研究自旋密度波（SDW）和超导（SC）状态的演变后，电子掺杂在CaFeCoAsF，它表现出的中间相图之间的LaFeAsOF和Ba（FeCo）As。我们发现，均匀共存的无公度SDW和SC状态只发生在一个狭窄的掺杂区域周围的交叉制度，支持波对称性。然而，只有结构相变生存后进一步掺杂，这与轨道涨落理论的预测。电子掺杂后的过渡特征意味着自旋和轨道涨落都参与了超导机制。
We performed nuclear magnetic resonance measurements to investigate the evolution of spin-density-wave (SDW) and superconducting (SC) states upon electron doping in CaFeCoAsF, which exhibits an intermediate phase diagram between those of LaFeAsOFand Ba(FeCo)As. We found that homogeneous coexistence of the incommensurate SDW and SC states occurs only in a narrow doping region around the crossover regime, which supports-wave symmetry. However, only the structural phase transition survives upon further doping, which agrees with predictions from orbital fluctuation theory. The transitional features upon electron doping imply that both spin and orbital fluctuations are involved in the superconducting mechanism.