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An extraordinary temperature dependence of the resonant Andreev reflectionvia discrete energy level in a normal-metal / quantum-dot / superconductor(N-QD-S) system is predicted theoretically by using Green function technique.The width of zero bias conductance peak in N-QD-S is about $\sqrt{\Gamma_L^2+\Gamma_R^2}$ and does not exhibit thermal broadening, where $\Gamma_L$ and$\Gamma_R$ are the coupling strength between QD and leads. Considering theintra-dot Coulomb interaction, the Coulomb blockade oscillations conducted byAndreev reflection differs dramatically from that in N-QD-N. Instead of thermalbroadening, finite temperature induces more resonant peaks around theoscillation peaks of zero temperature. This effect can be applied to determinethe coupling strength and QD level spacing in N-QD-S.Comment: 11 pages, 3 figures, LaTe

Extraordinary temperature dependence of the resonant Andreev reflection