A Single-Electron Transistor Made of a 3D Topological Insulator Nanoplate

Yumei Jing, Shaoyun Huang, Jinxiong Wu, Mengmeng Meng, Xiaobo Li, Yu Zhou, Hailin Peng, Hongqi Xu

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

Quantum confined devices of 3D topological insulators are proposed to be promising and of great importance for studies of confined topological states and for applications in low-energy-dissipative spintronics and quantum information processing. The absence of energy gap on the topological insulator surface limits the experimental realization of a quantum confined system in 3D topological insulators. Here, the successful realization of single-electron transistor devices in Bi2Te3 nanoplates using state-of-the-art nanofabrication techniques is reported. Each device consists of a confined central island, two narrow constrictions that connect the central island to the source and drain, and surrounding gates. Low-temperature transport measurements demonstrate that the two narrow constrictions function as tunneling junctions and the device shows well-defined Coulomb current oscillations and Coulomb-diamond-shaped charge-stability diagrams. This work provides a controllable and reproducible way to form quantum confined systems in 3D topological insulators, which should greatly stimulate research toward confined topological states, low-energy-dissipative devices, and quantum information processing.

Originalspråkengelska
Artikelnummer1903686
TidskriftAdvanced Materials
Volym31
Nummer42
Tidigt onlinedatum2019
DOI
StatusPublished - 2019

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik

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