De Haas-van Alphen Effect across the CeRh$_{1-x}$Co$_x$In$_5$ Phase Diagram

We present de Haas-van Alphen (dHvA) data across the phase diagram of CeRh$_{1-x}$Co$_x$In$_5$ down to ultra-low temperatures. The chemical substitution of Co for Rh, which changes the electronic structure of CeRhIn$_5$ from a localized 4\textit{f} electron configuration at $x=0$ to itinerant behaviour at $x=1$, is analogous to the application of external pressure to the antiferromagnet CeRhIn$_5$, which was shown to exhibit a discontinuous evolution of its Fermi surfaces near 2.35GPa [Shishido \textit{et al.} J Phys. Soc. Jpn. \textbf{74}, 1103 (2005)]. Exploiting the rotational degree of freedom afforded by ambient pressure measurements of single-crystal specimens, we analyze both the Fermi surface geometry and quasiparticle effective masses of CeRh$_{1-x}$Co$_x$In$_5$ as a function of chemical substitution in order to investigate the evolution of electronic structure through the antiferromagnetic quantum critical point of this system.