Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1-xCoxIn5

Article

关键词: CECOIN5;    CRITICALITY;    PRESSURE;    CERHIN5;   

DOI  :  10.1103/PhysRevB.76.132507

来源: SCIE

【 摘 要 】

Elastic neutron diffraction measurements were performed on the quasi-two-dimensional heavy-fermion system CeRh1-xCoxIn5, ranging from an incommensurate antiferromagnet for low Co composition x to an unconventional superconductor on the Co-rich end of the phase diagram. We found that the superconductivity competes with the incommensurate antiferromagnetic (AFM) order characterized by q(I)=(1/2,1/2,delta) with delta=0.298, while it coexists with the commensurate AFM order with q(c)=(1/2,1/2,1/2). This is in sharp contrast to the CeRh1-xIrxIn5 system, where both the commensurate and incommensurate magnetic orders coexist with the superconductivity. These results reveal that particular areas on the Fermi surface nested by q(I) play an active role in forming the superconducting state in CeCoIn5.

【 授权许可】

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