Electrically defined topological interface states of graphene surface plasmons based on a gate-tunable quantum Bragg grating oleh Fan Zhiyuan, Dutta-Gupta Shourya, Gladstone Ran, Trendafilov Simeon, Bosch Melissa, Jung Minwoo, Iyer Ganjigunte R. Swathi, Giles Alexander J., Shcherbakov Maxim, Feigelson Boris, Caldwell Joshua D., Allen Monica, Allen Jeffery, Shvets Gennady