Crossed Andreev reflection in a graphene bipolar transistor

J. Cayssol (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne

We investigate the crossed Andreev reflections between two graphene leads connected by a narrow superconductor. When the leads are respectively of the n-and p- type, we find that electron elastic cotunneling and local Andreev reflection are both eliminated even in the absence of any valley-isospin or spin polarizations. We further predict oscillations of both diagonal and cross conductances as a function of the distance between the graphene-superconductor interfaces.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]; Supraconductivité [cond-mat.supr-con]

J. Cayssol. Crossed Andreev reflection in a graphene bipolar transistor. Physical Review Letters, 2008, 100, pp.147001. ⟨10.1103/PhysRevLett.100.147001⟩. ⟨hal-00346576⟩