Tunneling spectroscopy in AlNiCo decagonal quasicrystals
Tunneling spectroscopy in AlNiCo decagonal quasicrystals
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DOI：
10.1103/physrevlett.82.1229
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发表时间：
1999-02
影响因子：
8.6
通讯作者：
Li Guo-hong;He Haifeng;Wang Yun-Ping;Lu Li;L. Shanlin;Jing Xiunian;Z. Dian-lin
中科院分区：
文献类型：
--
作者：
Li Guo-hong;He Haifeng;Wang Yun-Ping;Lu Li;L. Shanlin;Jing Xiunian;Z. Dian-lin
在超低温下测量了Al73Ni17Co10十方单晶准晶的隧道光谱。除了在以前的光发射实验中观察到的宽赝隙之外。在费米能量周围的态密度中发现了非常丰富的精细结构。精细结构对外加磁场有强烈的依赖性，并在4 t以上消失，结的零偏置电阻随磁场变化复杂，这可能与准晶体的层次结构有关。在零磁场中，在某些偏置范围内观察到令人费解的滞后现象，其原因有待进一步研究。[s0031 - 9007(99) 08419 - 7]。
Tunneling spectroscopy of Al73Ni17Co10 decagonal single quasicrystals has been measured at ultralow temperatures. In addition to the wide pseudogap observed in previous photoemission experiments. very rich fine structures in the density of states around the Fermi energy were discovered. The fine structures strongly depend on the applied magnetic field and disappear above similar to 4 T. The zero-bias resistance of the junction varies with magnetic fields in a complicated way, which is suggested to be related to the hierarchy structure of quasicrystals. A puzzling hysteretic phenomenon was observed in some bias ranges in zero magnetic field, the origin of which needs to be clarified in the future. [S0031-9007(99)08419-7].