Superconductivity without inversion symmetry: MnSi versus CePt3Si.
Superconductivity in materials without spatial inversion symmetry is studied. We show that in contrast to common belief, spin-triplet pairing is not entirely excluded in such systems. Moreover, paramagnetic limiting is analyzed for both spin-singlet and -triplet pairing. The lack of inversion symmetry reduces the effect of the paramagnetic limiting for spin-singlet pairing. These results are applied to MnSi and CePt3Si.
Frigeri
P A
PA
Theoretische Physik ETH-Hönggerberg, CH-8093 Zürich, Switzerland.
Agterberg
D F
DF
Koga
A
A
Sigrist
M
M