title: Observation of the Kondo effect in a spin-3/2 hole quantum dot.
abstract: We report the observation of Kondo physics in a spin-3/2 hole quantum dot. The dot is formed close to pinch-off in a hole quantum wire defined in an undoped AlGaAs/GaAs heterostructure. We clearly observe two distinctive hallmarks of quantum dot Kondo physics. First, the Zeeman spin splitting of the zero-bias peak in the differential conductance is independent of the gate voltage. Second, this splitting is twice as large as the splitting for the lowest one-dimensional subband. We show that the Zeeman splitting of the zero-bias peak is highly anisotropic and attribute this to the strong spin-orbit interaction for holes in GaAs.
authors: School of Physics, University of New South Wales, Sydney, Australia. klochan@phys.unsw.edu.au
authors: O
authors: O
authors: Klochan
authors: A P
authors: AP
authors: Micolich
authors: A R
authors: AR
authors: Hamilton
authors: K
authors: K
authors: Trunov
authors: D
authors: D
authors: Reuter
authors: A D
authors: AD
authors: Wieck