The Josephson effect in a molecular structure mimicking a benzene molecule (C6H6) placed between two nanometric superconducting electrodes is theoretically studied. In the tight binding model, the Bogoliubov-de Gennes equations are solved to derive the Andreev reflection coefficient and hence the dc Josephson current. Two effects are pointed out: the quantum interference effect on the supercurrent due to the presence of two branches in the molecule and a on-resonance off-resonance state operation in the presence of an applied gate voltage. The results provide an insight on the molecular electronics devices in the case of superconducting nano-electrodes
Quantum Interference and Josephson Effect in a Single Molecule Electronic System
Nappi Ciro;Sarnelli Ettore;Parlato Loredana;Cassinese Antonio;
2017
Abstract
The Josephson effect in a molecular structure mimicking a benzene molecule (C6H6) placed between two nanometric superconducting electrodes is theoretically studied. In the tight binding model, the Bogoliubov-de Gennes equations are solved to derive the Andreev reflection coefficient and hence the dc Josephson current. Two effects are pointed out: the quantum interference effect on the supercurrent due to the presence of two branches in the molecule and a on-resonance off-resonance state operation in the presence of an applied gate voltage. The results provide an insight on the molecular electronics devices in the case of superconducting nano-electrodesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
