Nonreciprocal charge transport at topological insulator/superconductor interface


Publication Details

Authors:K. Yasuda, H. Yasuda, T. Liang, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, N. Nagaosa, Masashi Kawasaki, Y. Tokura


Nature Communications



Published online:

Jun 21, 2019

Press release online (Japanese text only):

[PDF: 648KB]

Nonreciprocal transport in a Bi2Te3/FeTe heterostructure. 
The illustration of a Bi2Te3/FeTe heterostructure (Bi2Te3: blue, FeTe: green). The interface of Bi2Te3 and FeTe shows superconductivity (yellow region). The nonreciprocal transport is measured with current I along x-direction under the in-plane magnetic field B (along y-direction) perpendicular to the current. The mutual interaction between spin–momentum-locked topological surface state and superconductivity (as represented by ΔSC) is expected at the interface as expressed in momentum space in the right circle. σ represents the spin direction of the electron.