1. 1) K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S.V. Dubonos, I.V. Grigorieva and A.A. Firsov : Science 306, 666 (2004).
2. 2) K.S. Novoselov, D. Jiang, F. Schedin, T.J. Booth, V.V. Khotkevich, S.V. Morozov and A.K. Geim : Proc. Natl. Acad. Sci. U.S.A. 102, 10451 (2005).
3. 3) C.R. Dean, A.F. Young, I. Meric, C. Lee, L. Wang, S. Sorgenfrei, K. Watanabe, T. Taniguchi, P. Kim, K.L. Shepard and J. Hone : Nat. Nanotechnol. 5, 722 (2010).
4. 4) Z. Ahmed, A. Afzalian, T. Schram, D. Jang, D. Verreck, Q. Smets, P. Schuddinck, B. Chehab, S. Sutar, G. Arutchelvan, A. Soussou, I. Asselberghs, A. Spessot, I.P. Radu, B. Parvais, J. Ryckaert and M.H. Na : Tech. Dig. - Int. Electron Devices Meet. IEDM 2020-Decem, 22.5.1 (2020).
5. 5) A.K. Geim and I.V. Grigorieva : Nature 499, 419 (2013).