Contact-resistance detection of the minigap in Al-Bi2Te3-Al Josephson junctions remains valid under rf irradiation, with the rf-broadened gap feature reproduced by an RSJ-plus-BTK simulation.
Evidence of Majorana Zero Modes in Josephson Trijunctions
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abstract
In search of fault-tolerant topological quantum computation (TQC), zero-bias conductance peak as a necessary signature of Majorana zero modes (MZMs) has been observed in a number of solid-state systems. Here, we present the signature of MZMs from a phase-sensitive experiment on Josephson trijunctions constructed on the surface of three-dimensional topological insulators. We observed that the minigap at the center of the trijunction is protected to close over extended regions in phase space, supporting in principle the Majorana phase diagram proposed by Fu and Kane in 2008. Our study paves the way for further braiding MZMs and exploring TQC on a scalable two-dimensional platform.
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2019 1verdicts
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Probing the minigap in topological insulator-based Josephson junctions under radio frequency irradiation
Contact-resistance detection of the minigap in Al-Bi2Te3-Al Josephson junctions remains valid under rf irradiation, with the rf-broadened gap feature reproduced by an RSJ-plus-BTK simulation.