Retention of Two-Band Superconductivity in Highly Carbon-Doped MgB2
H. Schmidt, K. E. Gray, D. G. Hinks, J. F. Zasadzinski, M. Avdeev, J. D. Jorgensen, J. C. Burley
Abstract
Tunneling data on MgB1.8C0.2 show a reduction in the energy gap of the pi-bands by a factor of two from undoped MgB2 that is consistent with the Tc reduction, but inconsistent with the expectations of the dirty limit. Dirty-limit theory for undoped MgB2 predicts a single gap about three times larger than measured and a reduced Tc comparable to that measured. Our heavily-doped samples exhibit a uniform dispersion of C suggestive of significantly enhanced scattering, and we conclude that the retention of two-band superconductivity in these samples is caused by a selective suppression of interband scattering.
Create a lesson
Related papers
Tailored VxOy Metal--Insulator-Transition Oxides for Temperature-Triggered Smart Insulation in Superconducting Coils
Mattia Ortino, Davide Uglietti, Andrea Testino et al.
Superconductivity from altermagnetic fluctuations: the crucial role of sublattice polarization
Mats Barkman, Andreas Kreisel, Brian M. Andersen
Molecule-intercalated van der Waals Josephson junctions uncover complex multiband superconductivity
Daniel Margineda, David Caldevilla-Asenjo, Covadonga Álvarez-García et al.
Photon echo from Maki-Thompson interference in a fluctuating s-wave superconductor
Hui Zhou, Yuan Wan
Pressure Evolution of the Superconducting Order Parameter of Kagome Superconductor CsV3Sb5
Haiyan Zuo, Wangju Yang, Zhifan Wu et al.
Spatial interference changes the symmetry class of a Josephson element
Takayuki Kubo