Sommaire:

Motivated by experimental observations of ripples in suspended graphene,
we analyze elastic properties of two-dimensional crystalline membranes with various types of randomness [1]. We demonstrate that random fluctuations of the membrane curvature induced by static disorder lead to a non-monotonous scaling of the bending rigidity, causing the transition between the flat and crumpled phases. We also explore the effect of critical fluctuations of a membrane on electronic transport through the system in the presence of electron-phonon coupling [2,3].

[1] I.V. Gornyi, V.Yu. Kachorovskii, and A.D. Mirlin, Rippling and crumpling in disordered free-standing graphene, arXiv:1505.04483, to appear in Phys. Rev. B. (2015).
[2] I.V. Gornyi, V.Yu. Kachorovskii, and A.D. Mirlin, Conductivity of suspended graphene at the Dirac point, Phys. Rev. B 86, 165413 (2012).
[3] A.P. Dmitriev, I.V. Gornyi, A.D. Mirlin, I.V. Protopopov, in preparation.

Pour plus d'informations, merci de contacter Frigerio M.