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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Spin-polarized currents induced in antiferromagnetic polymer multilayered field-effect transistors
Shih-Jye Sun1,2, Miroslav Menŝík3, Petr Toman3
1Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, Republic of China. sjs@nuk.edu.tw.
Physical Chemistry Chemical Physics : PCCP
|April 18, 2024
Summary
This study introduces a theoretical model for antiferromagnetic polymer transistors, revealing unique current-voltage behaviors and spin-polarization control crucial for spintronics applications.
Area of Science:
- Spintronics
- Polymer Electronics
- Quantum Transport
Background:
- Standard field-effect transistors (FETs) rely on charge transport.
- Antiferromagnetic materials offer unique spin-dependent properties.
- Polymer-based electronics are gaining traction for flexible devices.
Purpose of the Study:
- To theoretically construct and analyze an antiferromagnetic polymer multilayered field-effect transistor.
- To investigate the quantum spin-charge distribution and its dependence on gate and drain voltages.
- To explore novel current-voltage characteristics and spin-polarization phenomena.
Main Methods:
- Quantum mechanical modeling of on-chain spin-charge distribution.
- Self-consistent coupling of spin-charge distribution with gate-controlled charge distribution.
- Analysis of the interplay between antiferromagnetic coupling, Coulomb interaction, and external voltages.
Main Results:
- Observed superlinear current increase, followed by a peak at drain voltages lower than gate voltages, and subsequent decrease without saturation.
- Demonstrated significant dependence of current spin-polarization ratio on drain voltage due to varying on-chain mobility.
- Showcased tunable spin-polarized currents through manipulation of gate and drain voltages.
Conclusions:
- The proposed antiferromagnetic polymer FET exhibits distinct transport properties compared to conventional FETs.
- The device offers substantial control over spin-polarized currents, highlighting its potential for spintronics.
- The findings pave the way for novel spintronic devices based on polymer materials.
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