Nonlocal Transistor Based on Pure Crossed Andreev Reflection in a EuO-Graphene/Superconductor Device Yee Sin Ang, L. K. Ang, Chao Zhang, Zhongshui Ma POSTER 70

S Potentials of Crossed Andreev Reflection Cooper pair splitter Superconductor Superconductor Normal Normal Normal Local Andreev reflection Crossed Andreev reflection A. F. Andreev, J. Expt. Theor. Phys. 19, 1228 (1964) S N1 N2 Potentials of Crossed Andreev Reflection Cooper pair splitter Probe fundamental physics – Bell’s theorem Spintronics Building block of solid-state quantum computing J. M. Byers et al, Phys. Rev. Lett. 74, 306 (1995) E. Prada et al, Eur. Phys. J. B 40, 379 (2004) Cooper pair splitter

Challenges: Requires precise tuning of Fermi levels and bais voltage 𝑒𝑉=𝜇 𝐸 𝐹 =−𝜇   𝐸 𝐹 =𝜇 X  S AR EC CAR 𝐸 𝐹 = 𝐸 𝑣   𝐸 𝐹 = 𝐸 𝑐   Dirac point blocking Bandgap blocking Graphene Semiconductor J. Cayssol, Phys. Rev. Lett. 100, 147001 (2008) M. Veldhorst et al, Phys. Rev. Lett. 105, 107002 (2010) Challenges: Requires precise tuning of Fermi levels and bais voltage Pure crossed Andreev reflection in a spin-split and gapped energy dispersion Y. S. Ang et al, Phys. Rev. B 93, 041422(R) (2016)

Poster 70 – Nonlocal Transistor Based on Pure Crossed Andreev Reflection in a EuO-Graphene/Superconductor Device