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Updated: Jul 17, 2025
07:12
A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
Published on: August 28, 2018
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Tunable Chirality-Dependent Nonlinear Electrical Responses in 2D Tellurium.
Chang Niu1,2, Gang Qiu1,2, Yixiu Wang3
1Elmore Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
Nano Letters
|September 7, 2023
Summary
Chiral two-dimensional (2D) tellurium (Te) exhibits unique nonlinear electrical responses. Chirality influences electron transport, paving the way for novel electronic devices utilizing spin-orbit coupling and crystal symmetry.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Tellurium (Te) is an elemental semiconductor with inherent chirality.
- Two-dimensional (2D) Te synthesized via solution methods possesses remarkable properties.
- Chiral crystal structures offer unique electronic behaviors.
Purpose of the Study:
- To identify and analyze the chirality of hydrothermally grown 2D Te.
- To investigate the nonlinear electrical responses in chiral 2D Te.
- To explore the relationship between chirality, spin-orbit coupling, and electronic transport.
Main Methods:
- Hot sulfuric acid etching for chirality analysis.
- High-angle tilted high-resolution scanning transmission electron microscopy (HRSTEM).
- Magnetic field application to observe electrical transport phenomena.
Main Results:
- Gate-tunable nonlinear electrical responses observed in 2D Te.
- Nonreciprocal longitudinal transport and nonlinear planar Hall effect detected.
- Opposite signs of nonlinear electrical responses in left- and right-handed 2D Te, linked to spin polarization.
Conclusions:
- Chiral symmetry in 2D Te dictates opposite spin polarizations.
- Spin-orbit coupling and crystal symmetry are fundamentally linked in enantiomers.
- Chiral 2D Te offers a platform for chirality-based electronic devices.
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