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| Abstract |
Bi_2Sr_2CaCu_2O_{8＋delta}(BSCCO)-SiO－Ag積層型接合を用いた準粒子トンネルの実験結果を報告する.{001}配向接合に関しては，d波超伝導体で予想されているV字のギャップ構造が観測された．また,{100}および{110}配向接合に関しては,zerobias conductance peak(ZBCP)が再現性良く観測された.ZBCPの温度依存性も測定したが，ZBC...Pは超伝導転移温度T_c以下で観測された．我々の実験結果は，d波超伝導体と常伝導体の間のAndreev反射の最近の研究結果と一致した．
We report the experimental results of quasiparticle tunneling using Bi_2Sr_2CaCu_2O_{8＋delta}(BSCCO)-SiO－Ag planar junctions. For the {001}-oriented junctions, we have measured a well-known V-shaped gap structure expected for d-wave supercoductors. For the {100}- and {110}-oriented junctions, a reprodicible zero bias conductance peak (ZBCP) has been observed. The temperature dependence of the ZBCP is also presented. The ZBCP was observed below T_c. Our results are consistent with those of recent studies on the andreev reflection between a d-wave superconductor and a normal metal.show more
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