2023 Fiscal Year Final Research Report
Graphene-based high temperature two-dimensional topological insulator for realizing Majorana fermions
| Project/Area Number |
22K13989
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
|
|---|
| Research Institution | Institute of Physical and Chemical Research |
|---|
Principal Investigator |
Tu Ngoc Han 国立研究開発法人理化学研究所, 創発物性科学研究センター, 特別研究員 (00862327)
|
|---|
| Project Period (FY) |
2022-04-01 – 2024-03-31
|
| Keywords | Topological insulators / Graphene / van der Waals / helical edge states |
|---|
| Outline of Final Research Achievements |
We focus on van der Waals heterostructures combining graphene with Bi2-xSbxTe3-ySey thin film (BSTS), one of the best three-dimensional topological insulators (3D-TIs). We have shown that graphene is a good platform for growing high quality BSTS films with thicknesses in the range of 10 to 30 nm. When the thickness of the BSTS films is below 10 nm, the proximity effect induced enhancement of the spin-orbit interaction at the interface of graphene and BSTS ultrathin films supports the emergence of helical edge states along the edge.
|
| Free Research Field |
Physics
|
| Academic Significance and Societal Importance of the Research Achievements |
The development of a highly controllable fabrication method for 2D-TIs holds significant potential for the next generation of electronic devices. Moreover, helical edge states is an idea platform to discovery Majorana fermions that can become a future material for quantum computer.
|
