Kavli Affiliate: Xiang Zhang
| First 5 Authors: Duolin Wang, Duolin Wang, , ,
| Summary:
In the past two decades, enormous efforts have been made to search for
possible platforms and schemes to implement topological quantum computation
(TQC). In exploring the Fu-Kane scheme of TQC based on Josephson trijunctions
constructed on topological insulators, the expected Majorana phase diagram of a
single trijunction has been experimentally verified. If Majorana zero modes
indeed exist in this kind of trijunctions, coupling between them in multiple
trijunction devices would be further expected. In this study, we fabricated
Josephson devices containing two adjacent Josephson trijunctions on the surface
of Sn-(Bi,Sb)2(Te,S)3, and observed that the minigap reopens for both
trijunctions in their phase spaces where a closure would otherwise be expected
if the trijunctions existed independently. Our findings would provide new
experimental support for the validity of the Fu-Kane theory and instill further
confidence in advancing along the TQC scheme proposed by Fu and Kane.
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