From Ising Resonant Fluctuations to Static Uniaxial Order in Antiferromagnetic and Weakly Superconducting CeCo(In1−xHgx)5(x=0.01)

C. Stock; J. A. Rodriguez-Rivera; K. Schmalzl; F. Demmel; D. K. Singh; F. Ronning; J. D. Thompson; E. D. Bauer

doi:10.1103/PhysRevLett.121.037003

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From Ising Resonant Fluctuations to Static Uniaxial Order in Antiferromagnetic and Weakly Superconducting CeCo(In1−xHgx)5(x=0.01)

C. Stock, J. A. Rodriguez-Rivera, K. Schmalzl, F. Demmel, D. K. Singh, F. Ronning, J. D. Thompson, E. D. Bauer

DOI 10.1103/PhysRevLett.121.037003 · Physical Review Letters

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Abstract

CeCo(In0.990Hg0.010)5 is a charge doped variant of the d-wave CoCoIn5 superconductor with coexistent antiferromagnetic and superconducting transitions occurring at TN=3.4 and Tc=1.4 K, respectively. We use neutron diffraction and spectroscopy to show that the magnetic resonant fluctuations present in the parent superconducting phase are replaced by collinear c-axis magnetic order with three-dimensional Ising critical fluctuations. No low-energy transverse spin fluctuations are observable in this doping-induced antiferromagnetic phase and the dynamic resonant spectral weight predominately shifts to the elastic channel. Static (τ>0.2 ns) collinear Ising order is proximate to superconductivity in CeCoIn5 and is stabilized through hole doping with Hg.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCo(In0.990Hg0.010)5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.4	Pressure not reported	unknown
CeCo(In0.987Hg0.013)5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.4	Pressure not reported	unknown
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