paper

From Ising resonant fluctuations to static uniaxial order in antiferromagnetic and weakly superconducting CeCo(In $_{1 - x}$ Hg $_{x}$ ) $_{5}$ ( $x$ =0.01)

arXiv:1807.03008 · doi:10.1103/PhysRevLett.121.037003

Abstract

CeCo(In $_{0.990}$ Hg $_{0.010}$ ) $_{5}$ is a charge doped variant of the $d$ -wave CoCoIn $_{5}$ superconductor with coexistent antiferromagnetic and superconducting transitions occurring at T $_{N}$ = 3.4 K and T $_{c}$ =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 ( $I ¨ $ $>$ 0.2 ns) collinear Ising order is proximate to superconductivity in CeCoIn $_{5}$ and is stabilized through hole doping with Hg.

(main text - 5 pages, 4 figures; supplementary information - 4 pages, 5 figures, to be published in Physical Review Letters)

From Ising resonant fluctuations to static uniaxial order in antiferromagnetic and weakly superconducting CeCo(In1−x​Hgx​)5​ (x=0.01)

Abstract

From Ising resonant fluctuations to static uniaxial order in antiferromagnetic and weakly superconducting CeCo(In $_{1 - x}$ Hg $_{x}$ ) $_{5}$ ( $x$ =0.01)