Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial (Graphene on hexagonal boron nitride as an tunable hyperbolic metamaterial)
S. Dai, Q. Ma, M. K. Liu, T. Andersen, Z. Fei, M. D. Goldflam, M. Wagner, K. Watanabe, T. Taniguchi, M. Thiemens, F. Keilmann, G. C. A. M. Janssen, S-E. Zhu, P. Jarillo-Herrero, M. M. Fogler, D. N. Basov.