[Zurück]

M. Nicklas, F. Steglich, J. Knolle, I. Eremin, R. Lackner, E. Bauer:
"Pair breaking by nonmagnetic impurities in the noncentrosymmetric superconductor CePt3Si";
Physical Review B, 81 (2010), 180511; S. 1 - 4.

We have studied the effect of Ge substitution and pressure on the heavy-fermion superconductor CePt3Si. Ge substitution on the Si site acts as negative chemical pressure leading to an increase in the unit-cell volume but also introduces chemical disorder. We carried out electrical resistivity and ac heat-capacity experiments under hydrostatic pressure on CePt3Si1−xGex (x=0,0.06). Our experiments show that the suppression of superconductivity in CePt3Si1−xGex is mainly caused by the scattering potential, rather than volume expansion, introduced by the Ge dopants. The antiferromagnetic order is essentially not affected by the chemical disorder.

http://dx.doi.org/10.1103/PhysRevB.81.180511