Physics – Condensed Matter – Superconductivity
Scientific paper
2002-06-22
Physics
Condensed Matter
Superconductivity
Scientific paper
10.1103/PhysRevB.67.024514
We discuss the possibility of coexistence of spin-singlet superconductivity and ferromagnetism in a model where the same electrons are assumed responsible for both of them. Our calculations include both zero and finite momentum pairing states with both s-wave and d-wave pairing symmetry. Under the mean-field approximation, the thermodynamic potential of the non-magnetic superconducting (SC) state is shown to be always lower than that of the superconducting ferromagnetic (SF) state. It follows that the spin-singlet SF state is energetically unfavorable, and a spin-triplet SF state is more likely to survive in metals such as UGe$_{2}$ and ZrZn$_{2}$.
Liu Shujuan
Shen Rongfeng
Xing Ding-Yu
Zheng Z. M.
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