Work

Superexchange blockade in triple quantum dots

Year: 2014

Type: article

Abstract: We propose the interaction of two electrons in a triple quantum dot as a minimal system to control long-range superexchange transitions. These are probed by transport spectroscopy. Narrow resonances appear indicating the transfer of charge from one side of the sample to the other with the central one being occupied only virtually. We predict that two different intermediate states establish the two arms of a one-dimensional interferometer. We find configurations where destructive interference of the two superexchange trajectories totally blocks the current through the system. We emphasize the role of spin correlations giving rise to lifetime-enhanced resonances.

Source: Physical Review B

DOI: 10.1103/physrevb.89.161402

Authors: Rafael Sánchez, Fernando Gallego-Marcos, Gloria Platero

Institutions: Consejo Superior de Investigaciones Científicas, Instituto de Ciencia de Materiales de Madrid, Technische Universität Berlin

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Ministerio de Ciencia e Innovación

Award: G8388238591