Physics – Condensed Matter – Superconductivity
Scientific paper
2003-05-08
Phys. Rev. B 69, 092502 (2004)
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures
Scientific paper
10.1103/PhysRevB.69.092502
Motivated by recent discoveries of novel superconductors such as Na$_x$CoO$_2\cdot y$H$_2$O and Sr$_2$RuO$_4$, we analysize features of quasi-particle scattering due to impurities and interfaces for possible gapful $d_{x^2-y^2}+id_{xy}$ and $p_x+ip_y$ Cooper pairing. A bound state appears near a local impurity, and a band of bound states form near an interface. We obtained analytically the bound state energy, and calculated the space and energy dependent local density of states resolvable by high-resolution scanning tunnelling microscopy. For comparison we also sketch results of impurity and surface states if the pairing is nodal p- or d-wave.
Wang Qiang-Hua
Wang Zheng-Dong
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