Full counting statistics of interacting quantum dots contacted by a normal metal and a superconductor
Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg - Philosophenweg 19, D-69120 Heidelberg, Germany
Received: 9 February 2014
Accepted: 22 April 2014
We investigate the effects of Coulomb interaction on charge transfer through a quantum dot attached to a normal and a superconducting lead. While for voltages much larger than the gap we recover the usual result for normal conductors, for voltages much smaller than the gap superconducting correlations lead to a drastically different behavior. Especially, the usual charge doubling in the normal case is reflected in the occurence of quartets due to the onsite interaction.
PACS: 74.50.+r – Tunneling phenomena; Josephson effects / 72.15.Qm – Scattering mechanisms and Kondo effect / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EPLA, 2014