Spin blockade with spin singlet electrons

Y. C. Sun*, S. Amaha, S. M. Huang, Juhn-Jong Lin, K. Kono, K. Ono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We observe a singlet spin blockade (SSB) in two-electron vertical double quantum dots where the single-electron transport is blocked for spin singlet electrons. In contrast to the conventional Pauli spin blockade with spin triplet electrons, this singlet spin blockade is observed under high magnetic field, where the doubly occupied states in one of the dots go beyond the singlet-triplet ground-state transition. The SSB region in Coulomb diamond measurements is in agreement with the two-electron excitation spectrum. A leakage current of 10 pA order is observed in SSB, consistent with the spin singlet lifetime due to random nuclear spin fluctuations.

Original languageEnglish
Article number263108
Number of pages3
JournalApplied Physics Letters
Issue number26
StatePublished - 24 Dec 2012

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