Physics – Condensed Matter – Superconductivity
Scientific paper
2008-03-31
Phys. Rev. B 78, 014518 (2008)
Physics
Condensed Matter
Superconductivity
5 pages, 5 figures, typos corrected, final version in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.78.014518
Motivated by the recent discovery of noncentrosymmetric superconductors, such as $CePt_{3}Si$, $CeRhSi_{3}$ and $CeIrSi_{3}$, we investigate theoretically the impurity resonance states with coexisting $s$- and p-wave pairing symmetries. Due to the nodal structure of the gap function, we find single nonmagnetic impurity-induced resonances appearing in the local density of state (LDOS). In particular, we analyze the evolution of the local density of states for coexisting isotropic s-wave and p-wave superconducting states and compare with that of anisotropic s-wave and p-wave symmetries of the superconducting gap. Our results show that the scanning tunneling microscopy can shed light on the particular structure of the superconducting gap in non-centrosymmetric superconductors.
Eremin Ilya
Liu Bin
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