Controllable tunneling of planar structures containing single-negative layers Sergey A. Afanas'ev, Irina V. Fedorova and Dmitriy I. Sementsov Eur. Phys. J. Appl. Phys., 95 2 (2021) 20501 Published online: 18 August 2021 DOI: 10.1051/epjap/2021210121