Non-equilibrium triplet blockade in parallel coupled quantum dots

TL;DR

This paper demonstrates a non-equilibrium triplet blockade phenomenon in parallel coupled quantum dots, where charge accumulates in the triplet state under certain bias conditions, revealing new transport blockade regimes.

Contribution

It introduces the concept of non-equilibrium triplet blockade in parallel quantum dots, extending the understanding of spin blockade phenomena beyond serial configurations.

Findings

Charge accumulates in the triplet state under specific bias voltages.

Non-equilibrium blockade regimes are analogous to Pauli spin blockade.

Triplet blockade occurs due to full occupation of the spin triplet state.

Abstract

It is demonstrated that parallel weakly coupled quantum dots exhibit non-equilibrium blockade regimes caused by a full occupation in the spin triplet state, in analogy to the Pauli spin blockade in serially weakly coupled quantum dots. Charge tends to accumulate in the two-electron triplet for bias voltages that support transitions between the singlet and three-electron states.