2013/07/31 by Jacob Linder, Takehito Yokoyama · 2 citations
Materials Science · Physics and Astronomy · #Andreev reflection #Condensed matter physics #Conductance #Dirac fermion #Electric field #Fermion #Graphene #Graphene research and applications #Josephson effect #Physics #Quantum and electron transport phenomena #Quantum mechanics #Silicene #Spin (aerodynamics) #Superconductivity #Supercurrent #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.89.020504
published as Phys. Rev. B 89, 020504(R) (2014) · 5 pages, 4 figures + supplementary information
arxiv created 2013/07/31 · openalex publication_date 2014/01/10 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We theoretically study the superconducting proximity effect in silicene, which features massive Dirac fermions with a tunable mass (band gap), and compute the conductance across a normal-superconductor (N-S) silicene junction, the nonlocal conductance of an N-S-N junction, and the supercurrent flowing in an S-N-S junction. It is demonstrated that the transport processes consisting of local and nonlocal Andreev reflection may be efficiently controlled via an external electric field owing to the buckled structure of silicene. In particular, we demonstrate that it is possible to obtain a fully spin-valley-polarized crossed Andreev reflection process without any contamination of elastic cotunneling or local Andreev reflection, in stark contrast to ordinary metals. It is also shown that the supercurrent flowing in the S-N-S junction can be fully spin-valley polarized and that it is controllable by an external electric field.