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Quantization of adiabatic pumped charge in the presence of superconducting lead | | Jian Wang
; Baigeng Wang
; | | Date: |
20 Feb 2002 | | Journal: | Phys. Rev. B Vol.65, 153311 (2002). | | Subject: | cond-mat | | Abstract: | We investigate the parametric electron pumping of a double barrier structure in the presence of a superconducting lead. The parametric pumping is facilitated by cyclic variation of the barrier heights $x_1$ and $x_2$ of the barriers. In the weak coupling regime, there exists a resonance line in the parameter space $(x_1,x_2)$ so that the energy of the quasi-bound state is in line with the incoming Fermi energy. Levinson et al found recently that the pumped charge for each pumping cycle is quantized with $Q=2e$ for normal structure when the pumping contour encircles the resonance line. In the presence of a superconducting lead, we find that the pumped charge is quantized with the value $2e$. | | Source: | arXiv, cond-mat/0202333 | | Services: | Forum | Review | PDF | Favorites | |
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