Phonon-assisted nearly pure spin current in DNA molecular chains: a multifractal analysis
S Fathizadeh1,2
1Department of Physics, Urmia University of Technology, Urmia, Iran. s.fathizadeh@sci.uut.ac.ir.
Scientific Reports
|December 2, 2023
Summary
We found that phonon vibrations in DNA chains can create pure spin currents, enhanced by heat. This discovery could lead to new molecular spintronic devices for data storage and transport.
Area of Science:
- Condensed Matter Physics
- Molecular Electronics
- Biophysics
Background:
- Molecular spintronics aims to utilize electron spin for information processing.
- DNA's potential for charge and spin transport is under investigation.
- Environmental interactions, like dephasing, significantly impact quantum transport phenomena.
Purpose of the Study:
- To investigate phonon-assisted spin transport in DNA chains.
- To analyze the role of environmental dephasing and thermal effects.
- To explore the potential for engineering molecular spintronic devices.
Main Methods:
- Multifractal analysis was employed to study spin transport.
- Simulations considered phonon-assisted transport in DNA under dephasing.
- The influence of temperature and chain length on spin states was examined.
Main Results:
- A nearly pure spin current is generated in DNA with a voltage gate.
- Increasing thermal effects and phonon temperature enhance the spin current.
- Strong electron-phonon coupling leads to more delocalized spin states.
- Phonon chirality can induce nontrivial spin textures and currents.
- Longer DNA chains exhibit higher spin selectivity.
Conclusions:
- Phonon effects are crucial for controlling spin transport in DNA.
- Thermal vibrations assist in generating and enhancing spin currents.
- DNA's spin transport properties can be engineered via phonon control.
- This research offers a pathway for developing novel molecular spintronic devices.
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