We report the results of de-Haas-van-Alphen (dHvA) measurements in Cd doped CeCoIn5 and LaCoIn5. Cd doping is known to induce an antiferromagnetic order in the heavy fermion superconductor CeCoIn5, whose effect can be reversed with applied pressure. We find a slight but systematic change of the dHvA frequencies with Cd doping in both compounds, reflecting the chemical potential shift due to the addition of holes. The frequencies and effective masses are close to those found in the nominally pure compounds with similar changes apparent in the Ce and La compounds with Cd substitution. We observe no abrupt changes to the Fermi surface in the high field paramagnetic state for x∼xc corresponding to the onset of antiferromagnetic ordering at H=0 in CeCo(In1−xCdx)5. Our results rule out f−electron localization as the mechanism for the tuning of the ground state in CeCoIn5 with Cd doping.
@article{arxiv.1003.2720,
title = {Fermi surface evolution through a heavy fermion superconductor-to-antiferromagnet transition: de Haas-van Alphen effect in Cd-substituted CeCoIn$_5$},
author = {C. Capan and Y-J. Jo and L. Balicas and R. G. Goodrich and J. F. DiTusa and I. Vekhter and T. P. Murphy and A. D. Bianchi and L. D. Pham and J. Y. Cho and J. Y. Chan and D. P. Young and Z. Fisk},
journal= {arXiv preprint arXiv:1003.2720},
year = {2015}
}