Full Counting Statistics with Spin-sensitive Detectors reveals Spin-singlets

Antonio Di Lorenzo, Yuli V. Nazarov

Published 2004-08-17, updated 2005-06-03Version 2

We study the full counting statistics of electric current to several drain terminals with spin-dependent entrance conductances. We show that the statistics of charge transfers can be interpreted in terms of single electrons and spin-singlet pairs coming from the source. If the source contains transport channels of high transparency, a significant fraction of electrons comes in spin-singlet pairs.