Table 7 Critical current versus temperature (ballistic model).

From: Josephson current mediated by ballistic topological states in Bi2Te2.3Se0.7 single nanocrystals

Sample

Δmini (meV)

Nchann

l

Tc (K)

W (nm)

d (nm)

SJ1

0.31

8

0.26

1.35

135

20

SJ2

0.40a

9

0.33

1.77

412

19

SJ3

0.46a

27

0.38

2.03

524

25

  1. Δmini effective gap proximity induced into Bi2Te2.3Se0.7, N number of ballistic channels carrying supercurrent, \(l=\hslash {v}_{{\rm{F}}}{(2\pi {k}_{{\rm{B}}}{T}_{{\rm{c}}}L)}^{-1}\), vF = 5.8 × 105 ms−1 Fermi velocity, taken from refs. 70,71,72, Tc critical temperature, W width and d thickness of the crystal.
  2. aΔmini is calculated assuming that ratio \(\frac{{\Delta }_{{\rm{mini}}}}{{k}_{{\rm{B}}}{T}_{{\rm{c}}}}\) is the same for all crystals.
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