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Rousan Debbarma

As seen in: Physical Review B
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Josephson Junction $\ensuremath{\pi}\text{\ensuremath{-}}0$ Transition Induced by Orbital Hybridization in a Double Quantum Dot

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By Athanasios Tsintzis, Markus Aspegren, Rubén Seoane Souto, Rousan Debbarma
| Physical Review B
In this Letter, we manipulate the phase shift of a Josephson junction using a parallel double quantum dot (QD). By employing a superconducting quantum interference device, we determine how orbital hybridization and detuning affect the current-phase relation in the Coulomb blockade regime. For weak hybridization between the QDs, we find π junction characteristics if at least one QD has an unpaired electron. Notably the critical current is higher when both QDs have an odd electron occupation.
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