Hsu Chunwei, Costi Theo A, Vogel David, Wegeberg Christina, Mayor Marcel, van der Zant Herre S J, Gehring Pascal
Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, Delft 2628 CJ, The Netherlands.
Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany.
Phys Rev Lett. 2022 Apr 8;128(14):147701. doi: 10.1103/PhysRevLett.128.147701.
Probing the universal low-temperature magnetic-field scaling of Kondo-correlated quantum dots via electrical conductance has proved to be experimentally challenging. Here, we show how to probe this in nonlinear thermocurrent spectroscopy applied to a molecular quantum dot in the Kondo regime. Our results demonstrate that the bias-dependent thermocurrent is a sensitive probe of universal Kondo physics, directly measures the splitting of the Kondo resonance in a magnetic field, and opens up possibilities for investigating nanosystems far from thermal and electrical equilibrium.
通过电导来探究近藤关联量子点的普适低温磁场标度已被证明在实验上具有挑战性。在此，我们展示了如何在应用于处于近藤 regime 的分子量子点的非线性热电流光谱学中进行这种探究。我们的结果表明，与偏置相关的热电流是普适近藤物理的灵敏探针，直接测量了磁场中近藤共振的分裂，并为研究远离热平衡和电平衡的纳米系统开辟了可能性。
