Full-Gap Superconductivity Robust against Disorder in Heavy-Fermion ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$

Author(s): T. Takenaka, Y. Mizukami, J. A. Wilcox, M. Konczykowski, S. Seiro, C. Geibel, Y. Tokiwa, Y. Kasahara, C. Putzke, Y. Matsuda, A. Carrington, and T. Shibauchi

Magnetic penetration depth measurements show that the superconducting gap in this iconic heavy-fermion superconductor is robust against the introduction of disorder, ruling out some superconductivity mechanisms as explanations.

[Phys. Rev. Lett. 119, 077001] Published Fri Aug 18, 2017