Anomalous Josephson Effect in Topological Insulator-Based Josephson Trijunction
Xiang Zhang, Zhaozheng Lyu, Guang Yang, Bing Li, Yan-Liang Hou, Tian Le, Xiang Wang, Anqi Wang, Xiaopei Sun, Enna Zhuo, Guangtong Liu, Jie Shen, Fanming Qu, Li Lü
Abstract
We studied anomalous Josephson effect (AJE) in Josephson trijunctions fabricated on Bi 2 Se 3 , and found that the AJE in T-shaped trijunctions significantly alters the Majorana phase diagram of the trijunctions, when an in-plane magnetic field is applied parallel to two of the three single junctions. Such a phenomenon in topological insulator-based Josephson trijunction provides unambiguous evidence for the existence of AJE in the system, and may provide an additional knob for controlling the Majorana bound states in the Fu–Kane scheme of topological quantum computation.
Topics & Concepts
Josephson effectMAJORANATopological insulatorPhysicsJosephson energyBound statePi Josephson junctionJosephson phaseInsulator (electricity)Topology (electrical circuits)Magnetic fieldCondensed matter physicsQuantumSuperconductivityQuantum mechanicsOptoelectronicsMathematicsCombinatoricsTopological Materials and PhenomenaQuantum many-body systemsAdvanced Condensed Matter Physics