Two-stage Kondo effect in a four-electron artificial atom
G. Granger, M. A. Kastner, Iuliana Radu, M. P. Hanson, A. C. Gossard
Abstract
An artificial atom with four electrons is driven through a singlet-triplet transition by varying the confining potential. In the triplet, a Kondo peak with a narrow dip at drain-source voltage Vds=0 is observed. The low energy scale Vds* characterizing the dip is consistent with predictions for the two-stage Kondo effect. The phenomenon is studied as a function of temperature T and magnetic field B, parallel to the two-dimensional electron gas. The low energy scales T* and B* are extracted from the behavior of the zero-bias conductance and are compared to the low energy scale Vds* obtained from the differential conductance. Good agreement is found between kT* and |g|muB*, but eVds* is larger, perhaps because of nonequilibrium effects.
Create a lesson
Related papers
Hall-Density Collapse as Direct Evidence for Percolative Conduction Onset in Monolayer MoS2 Transistors
R. V. Upadya, M. Introna, X. Wu et al.
Spin swapping mediated by spin-orbital textures in centrosymmetric multiorbital materials
Chengyuan Cai, Hanchen Wang, Rui-Chun Xiao et al.
Electrostatics of Chern junctions in a magnetic field
Robin Durand, Pascal Simon, Ion Garate
Spin Simulators based on Exciton-Polariton Waveguide Networks
Kevin Dini, Simone Zanotti, Timothy C. H. Liew
The quantized Hall effect knows which way the current flows: mirror covariance and rectification in a laterally asymmetric Hall bar
A. Siddiki
Floquet-Volkov spin polarization in spin-degenerate Antiferromagnets
Jiyang Fan, Dinghui Wang, Tongshuai Zhu