2019/09/11 by Teemu Elo, Zhenbing Tan, Ciprian Padurariu +5 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Graphene #Graphene research and applications #Low-power high-performance VLSI design #Physics #Quantum and electron transport phenomena #Quantum mechanics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.100.235433
published in Physical review. B./Physical review. B 100(23) (American Physical Society) · 25 pages, 7 figures
arxiv created 2019/09/11 · openalex publication_date 2019/12/18 · arxiv updated 2019/12/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Quadratic detection in linear mesoscopic transport systems produces cross terms that can be viewed as interference signals reflecting statistical properties of charge carriers. In electronic systems these cross-term interferences arise from exchange effects due to Pauli principle. Here we demonstrate fermionic Hanbury Brown and Twiss (HBT) exchange phenomena due to indistinguishability of charge carriers in a diffusive graphene system. These exchange effects are verified using current-current cross-correlations in combination with regular shot noise (autocorrelation) experiments at microwave frequencies. Our results can be modeled using semiclassical analysis for a square-shaped metallic diffusive conductor, including contributions from contact transparency. The experimentally determined HBT exchange factor values lie between the calculated ones for coherent and hot electron transport.