论文标题
温度诱导的基于纳米线的杂种量子点在Yu-Shiba-Rusinov的共振中的变化
Temperature Induced Shifts of Yu-Shiba-Rusinov Resonances in Nanowire-Based Hybrid Quantum Dots
论文作者
论文摘要
超导体与跨量子点的强耦合导致Yu-Shiba-Rusinov（YSR）离散子隙激发。在隔离和零温度下，激发为$δ$共振。然而，在运输实验中，它们显示为较大的差分电导峰。我们获得了峰的线形及其在基于超导体 - 量词 - 点 - 基准（S-QD-N）基于纳米线的设备中的温度依赖性。出乎意料的是，我们发现，峰值随温度的峰值变化，并取决于基态奇偶校验和偏置电压。此外，我们从经验上找到了峰面积与温度的幂律缩放。这些观察结果未通过当前模型来解释。
The strong coupling of a superconductor to a spinful quantum dot results in Yu-Shiba-Rusinov (YSR) discrete subgap excitations. In isolation and at zero temperature, the excitations are $δ$ resonances. In transport experiments, however, they show as broad differential conductance peaks. We obtain the lineshape of the peaks and their temperature dependence in superconductor-quantum-dot-metal (S-QD-N) nanowire-based devices. Unexpectedly, we find that the peaks shift in energy with temperature, with the shift magnitude and sign depending on ground state parity and bias voltage. Additionally, we empirically find a power-law scaling of the peak area versus temperature. These observations are not explained by current models.
