Singlet–triplet transition in a single-electron transistor at zero magnetic field
Singlet–triplet transition in a single-electron transistor at zero magnetic field
We report sharp peaks in the differential conductance of a single-electron transistor (SET) at low temperature, for gate voltages at which charge fluctuations are suppressed. For odd numbers of electrons we observe the expected Kondo peak at zero bias. For even numbers of electrons we generally observe Kondo-like features corresponding …