Impurity resonance states in noncentrosymmetric superconductor $CeP{t}_{3}Si$: a probe for Cooper-pairing symmetry

Abstract

Motivated by the recent discovery of noncentrosymmetric superconductors, such as $CeP{t}_{3}Si$, $CeRhS{i}_3$ and $CeIrS{i}_3$, 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.

5 pages, 5 figures, typos corrected, final version in Phys. Rev. B

References in corpus (8)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
• Non-centrosymmetric Superconductivity and Antiferromagnetic Order: Microscopic discussion of CePt${}_3$Si
• Emergent Nodal Excitations due to the Coexistence of Superconductivity and Antiferromagnetism: Cases with and without Inversion Symmetry
• Impurity and interface bound states in $d_{x^2-y^2}+i{d}_{xy}$ and $p_x+i{p}_y$ superconductors
• Effects of impurities on superconductivity in noncentrosymmetric compounds
• Microscopic Mechanism and Pairing Symmetry of Superconductivity in the Noncentrosymmetric Heavy Fermion Systems CeRhSI${}_3$ and CeIrSi${}_3$
• Magnetic field dependence of the superconducting gap node topology in non-centrosymmetric CePt${}_3$Si

Cited by in corpus (1)

• Superconductivity and Magnetism in Non-centrosymmetric System: Application to CePt_3Si