We analyze the screening of a magnetic quantum dot with spin 12 coupled to two helical liquids. Interestingly, we find two qualitatively different sets of Toulouse points, i.e., nontrivial parameters for which we can solve the two channel Kondo model exactly. This enables us to calculate the temperature and voltage dependent Kondo screening cloud, which develops oscillations for an applied spin voltage μs. Such a spin voltage can be conveniently applied by a charge bias in a four-terminal helical liquid setup.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)