Supercurrent diode effect and magnetochiral anisotropy in few-layer NbSe2

Abstract Nonreciprocal transport refers to charge transfer processes that are sensitive to the bias polarity. Until recently, nonreciprocal transport was studied only in dissipative systems, where the nonreciprocal quantity is the resistance. Recent experiments have, however, demonstrated nonreciprocal supercurrent leading to the observation of a supercurrent diode effect in Rashba superconductors. Here we report on a supercurrent diode effect in NbSe 2 constrictions obtained by patterning NbSe 2 flakes with both even and odd layer number. The observed rectification is a consequence of the valley-Zeeman spin-orbit interaction. We demonstrate a rectification efficiency as large as 60%, considerably larger than…

• EC
  European Commission

  Award: 862660
• DF
  Deutsche Forschungsgemeinschaft

  Awards: 314695032-SFB 1277, SFB 1277, Project-ID 314695032, 314695032
• H2
  Horizon 2020 Framework Programme

  Award: 862660