Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1−xCoxIn5
S. Ohira-Kawamura, H. Shishido, A. Yoshida, R. Okazaki, H. Kawano-Furukawa, T. Shibauchi, H. Harima, Y. Matsuda
DOI 10.1103/PhysRevB.76.132507 · Physical Review B
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Abstract
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 qI=(1∕2,1∕2,δ) with δ=0.298, while it coexists with the commensurate AFM order with qc=(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 qI play an active role in forming the superconducting state in CeCoIn5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
| CeIrIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.4 | Pressure not reported | unknown |
| CeRh0.6Co0.4In5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.2 | Pressure not reported | unknown |
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