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Manipulation of Rashba spin splitting in 2D Janus WSeTe by strain and electric field: a first-principles study
Wanfeng Yue1,2, Changqi Chen1,2, Shamraiz Hussain Talib3
1School of Physics, Henan Normal University, Xinxiang 453007, People's Republic of China.
Researchers explored tuning Rashba spin splitting in WSeTe using strain and electric fields. Strain engineering significantly enhances spin splitting, offering new avenues for spintronics and quantum computing applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Regulating Rashba spin splitting under low-power operation is a key research area.
- Tungsten diselenide telluride (WSeTe) is investigated for its intrinsic asymmetry and strong spin-orbit coupling (SOC).
Purpose of the Study:
- To investigate Rashba spin splitting in monolayer WSeTe.
- To understand how strain and electric fields manipulate Rashba spin splitting.
Main Methods:
- First-principles density functional theory calculations were employed.
- The effects of strain and external electric fields on WSeTe were simulated.
Main Results:
- Strain engineering significantly enhances Rashba spin splitting by altering orbital hybridization and overlap.
- External electric fields have limited effects due to screening and polarization compensation.
- A compressive strain of -3% suppresses spin splitting, but this effect is mitigated by a vertical electric field, showing a synergetic effect.
Conclusions:
- Strain plays a dominant role in manipulating Rashba spin splitting in WSeTe.
- The synergetic effect of strain and electric fields offers new possibilities for spintronic applications.
- This research paves the way for advanced two-dimensional materials in spin electronics and quantum computing.
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