Abstract
Taking into account the effects of quantum interference and interface scattering, combining the electron current with hole current contribution to tunnel current, we study the coherent quantum transport in normal-metal/d-wave superconductor/ normal-metal (NM/d-wave SC/NM) double tunnel junctions by using extended Blonder-Tinkham-Klapwijk (BTK) approach. It is shown that all quasiparticle transport coefficients and conductance spectrum exhibit oscillating behavior with the energy, in which periodic vanishing of Andreev reflection (AR) above superconducting gap is found. In tunnel limit for the interface scattering strength taken very large, there are a series of bound states of quasiparticles formed in SC.
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Blonder, G. E., Tinkham, M., Klapwijk, T. M., Transition from metallic to tunneling regimes in supercon-ducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion, Phys. Rev. B, 1982, 25(7): 4515–4532.
Dong, Z. C., Xing, D. Y., Wang, Z. D., et al., Interface scattering effect on the differential conductance of normal-metal/superconductor junctions, Z. Phys. B, 1996, 100(3): 329–334.
Dong, Z. C., Impurity and interface scattering effect on the differential conductance of normal-metal/d-wave superconductor junctions, Acta Phys. Sin. (in Chinese), 1999, 48(5): 926–935.
Tanaka, Y., Kashiwaya, S., Theory of tunneling spectroscopy ofd-wave superconductors, Phys. Rev. Lett., 1995, 74(17): 3451–3454.
Kashiwaya, S., Tanaka, Y., Koyanagi, M., et al., Origin of zero-bias conductance peaks in high-Tc superconductors. Phys. Rev. B, 1995, 51(2): 1350–1353.
Zhu, J. X., Friedman, B., Ting, C. S., Spin-polarized quasiparticle transport in ferromagnet-d-wave super-conductor junctions with a {110} interface, Phys. Rev. B, 1999, 59(14): 9558–9563.
Zutic, I., Valls, O. T., Tunneling spectroscopy for ferromagnet-superconductor junctions. Phys. Rev. B, 2000, 61(2): 1555–1566.
Dong, Z. C., Xing, D. Y., Wang, Z. D., et al., Anomaly of zero-bias conductance peaks in ferromagnet/d-wave superconductor junctions, Phys. Rev. B, 2001, 63(14): 144520(1)-144520(6).
Dong, Z. C., Xing, D. Y., Dong, J. M., Quantum interference effects on tunneling conductance and shot noise in ferromagnet/ferromagnet/d-wave superconductor double tunnel junctions. Phys. Rev. B, 2002, 65(21): 214512(1)-214512(6).
Zheng, Z., Qi, Y., Xing, D. Y. et al., Oscillating tunneling magnetoresistance in magnetic doubletunnel-junction structures, Phys. Rev. B, 1999, 59(14): 14505–14510.
Zheng, Z., Xing, D. Y., Sun, G. Y. et al., Andreev reflection effect on spin-polarized transport in ferromagnet/superconductor/ferromaget double tunnel junctions, Phys. Rev. B, 2000, 62(21): 14326–14330.
Bozovic, M., Radovic, Z., Subgap tunneling and conductance oscillations in ferromagnet/superconductor/ferromagnet junctions, Phys. Rev. B, 2002, 66(11): 134524(1)-134524(7).
Andreev, A. F., The thermal conductivity of the intermediate state in superconductors, Soviet Physics JETP, 1964, 19(5): 1228–1231.
de Gennes, P. G., Superconductivity of Metals and Alloys, New York: Benjamin, 1966.
Hu, C. R., Midgap surface states as a novel signature for\(d_{x_a^2 - x_b^2 } \)-wave super-conductivity. Phys. Rev. Lett., 1994, 72(10): 1526–1529.
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Dong, Z., Fu, H. Coherent quantum transport in normal-metal/d-wave superconductor/normal-metal double tunnel junctions. Sci China Ser G: Phy & Ast 47, 256–264 (2004). https://doi.org/10.1360/03yw0139
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DOI: https://doi.org/10.1360/03yw0139