Detecting entangled states in graphene via crossed Andreev reflection
arXiv:0802.3181 · doi:10.1103/PhysRevB.78.235403
Abstract
Shot noise cross-correlations across single layer graphene structures are calculated with insulators separating a superconducting region. A new feature of specular crossed Andreev reflection comes into play due to the unique band structure of graphene. This gives rise to a rich structure in the states of the electric current flowing across the graphene sheet. We identified a parametric regime where {\em positive} shot noise cross-correlations of the current appear signifying entanglement. In contrast to previous proposals the sign of the cross-correlations can be easily tuned by the application of a gate voltage.
5 pages, 5 figures, accepted for publication in Phys. Rev. B
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- Enhancement of crossed Andreev reflection in normal-superconductor-normal junction of thin topological insulator
- Enhanced Specular Andreev reflection in bilayer graphene
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- Perfect crossed Andreev reflection in the proximitized graphene/superconductor/proximitized graphene junctions
- Resonant tunneling through superconducting double barrier structures in graphene
- Even-odd effects in NSN scattering problems: Application to graphene nanoribbons
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- Anomalous Nonlocal Conductance as a Fingerprint of Chiral Majorana Edge States
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- Probing the topological character of superconductors via non-local Hanbury-Brown and Twiss correlations
- Pseudodiffusive transmission of nodal Dirac fermions through a clean d-wave superconductor
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- Long-range Cooper pair splitting by chiral Majorana edge states