Electrically Tunable Macroscopic Quantum Tunneling in a Graphene-Based Josephson Junction
Electrically Tunable Macroscopic Quantum Tunneling in a Graphene-Based Josephson Junction
Stochastic switching-current distribution in a graphene-based Josephson junction exhibits a crossover from the classical to quantum regime, revealing the macroscopic quantum tunneling (MQT) of a Josephson phase particle at low temperatures. Microwave spectroscopy measurements indicate a multi-photon absorption process occurring via discrete energy levels in washboard potential well. The crossover …