High-energy quasiparticle injection into mesoscopic superconductors
High-energy quasiparticle injection into mesoscopic superconductors
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DOI：
10.1038/s41565-020-00834-8
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发表时间：
2021-01-18
影响因子：
38.3
通讯作者：
Yacoby, Amir
中科院分区：
文献类型：
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作者：
Alegria, Loren D.;Bottcher, Charlotte G. L.;Yacoby, Amir
在非零温度下，超导体包含称为Bogoliubov准粒子（QP）的激发。量子点的介观动力学为量子信息处理器等设备的设计提供了信息。这些动力学的知识来源于实验，其中QP以受控的方式注入，通常以与配对能量相当的能量注入（1-5）。在这里，我们进行隧道光谱的介观超导体在高电场下。我们观察到QP注入由于场发射的电子与10（6）倍的配对能量，一个未知的制度QP动力学。在施加栅极电压时，QP注入降低了临界电流，并且在足够高的电场下，场发射电流（
At non-zero temperatures, superconductors contain excitations known as Bogoliubov quasiparticles (QPs). The mesoscopic dynamics of QPs inform the design of quantum information processors, among other devices. Knowledge of these dynamics stems from experiments in which QPs are injected in a controlled fashion, typically at energies comparable to the pairing energy(1-5). Here we perform tunnel spectroscopy of a mesoscopic superconductor under high electric fields. We observe QP injection due to field-emitted electrons with 10(6) times the pairing energy, an unexplored regime of QP dynamics. Upon application of a gate voltage, the QP injection decreases the critical current and, at sufficiently high electric field, a field-emission current (