2012/11/22 by Martina Flöser, Denis Feinberg, D. Feinberg +5 · 1 citation
Engineering · Physics and Astronomy · #Condensed matter physics #Conductance #Cooper pair #Current (fluid) #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Molecular Junctions and Nanostructures #Phase (matter) #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Scattering #Semiconductor materials and interfaces #Superconductivity #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1211.5341
18 pages, 18 figures, 1 table
arxiv created 2012/11/22 · openalex publication_date 2012/11/22 · arxiv updated 2012/11/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In three-terminal NSN hybrid structures the influence of additional barriers on the nonlocal conductance and on current cross-correlations is studied within a scattering theory. In metallic systems with additional barriers and phase averaging, which simulate disordered regions, local processes can be enhanced by reflectionless tunneling but this mechanism has little influence on nonlocal processes and on current cross-correlations. Therefore Cooper pair splitting cannot be enhanced by reflectionless tunneling. On the contrary, in ballistic systems, additional barriers lead to Fabry-Perot resonances and allow to separate the different contributions to the conductance and to the current cross-correlations. In particular, crossed Andreev processes can be selectively enhanced by tuning the length or the chemical potential of the interbarrier region.