dx2-y2-wave超导体CeCoIn5中的场致自旋激子凝聚
Field-Induced Spin-Exciton Condensation in dx2-y2-wave Superconducting CeCoIn5
摘要：
自旋激子机制的影响暴露在自旋密度波（SDW）不稳定性的上下文中发生的超导相的层状重电子化合物。在这个模型中，磁场作为一个调谐参数，使系统的横向自旋相关性增强，由于dx 2-y2波超导性和诱导的不稳定性共存的超导性和SDW秩序的阶段。该模型考虑了晶体中的电子与反铁磁相互作用，并提供了限制费米表面特性和有序波矢量（可以是相称的或不相称的接近结晶）。该模型应用于CeCoIn_5的低温/高磁场相[M. Kenzelmann等人，Science 321，1652（2008），Phys. Rev. Lett. 104，127001（2010）]。
英文摘要：
The implications of the spin exciton mechanism are exposed in the context of a Spin Density Wave (SDW) instability occurring inside the superconducting phase of a layered heavy electron compound. In this model a magnetic field serves as a tuning parameter bringing the system to the point where the transverse spin correlations are enhanced due to dx2 -y2 -wave superconductivity and induces an instability to a phase with coexisting superconductivity and SDW order. The model considers electrons in a crystal with antiferromagnetic interactions and provides restrictions on the Fermi surface characteristics and on the ordering wave-vector (that can be commensurate or incommensurate close to commensuration). The applications of the model are addressed to the low-temperature/high-magnetic-field phase of CeCoIn5 [M. Kenzelmann et al., Science 321, 1652 (2008), Phys. Rev. Lett. 104, 127001 (2010)].
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