Density of states in a vortex core and the zero-bias tunneling peak.
Density of states in a vortex core and the zero-bias tunneling peak.
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DOI：
10.1103/physrevlett.62.3089
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发表时间：
1989-06
影响因子：
8.6
通讯作者：
J. D. Shore;Ming-Zhu Huang;A. Dorsey;J. Sethna
中科院分区：
文献类型：
--
作者：
J. D. Shore;Ming-Zhu Huang;A. Dorsey;J. Sethna
扫描隧道显微镜测量/Hess/ital等//al al/。超导涡核的隧穿电导在小偏压下有一个明显的峰值。我们证明了这一峰值是由于核心中的准粒子束缚态造成的。Bogoliubov-de Gennes方程的数值解(和近似自洽的解)给出了核中态密度，这与考虑热展宽效应后的隧穿电导相似。我们在局域态密度中发现了在较低温度下应该能观察到的附加结构。
Scanning-tunneling-microscope measurements by Hess /ital et/ /ital al/. of the tunneling conductance into a superconducting vortex core show a pronounced peak at small bias. We show that this peak is due to the quasiparticle bound states in the core. A numerical (and approximately self-consistent) solution of the Bogoliubov--de Gennes equations yields the /ital local/ density of states in the core, which resembles the tunneling conductance once we account for thermal broadening effects. We find additional structure in the local density of states which should be observable at lower temperatures.