Dissipationless Quantum Spin Current at Room Temperature
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Overview
Theoretical study predicts electric-field-induced dissipationless quantum spin currents in hole-doped semiconductors, suggesting pathways to ultra-low-power quantum spintronics.
Key Points
- Determine whether an external electric field can generate an intrinsic, dissipationless quantum spin current at room temperature in semiconductors without requiring ferromagnetic materials.
- Developed a theoretical model generalizing the quantum Hall effect to describe spin-dependent transport phenomena.
- Calculated spin current responses to applied electric fields in hole-doped semiconductors, specifically silicon (Si), germanium (Ge), and gallium arsenide (GaAs).
- Electric fields theoretically induce substantial dissipationless quantum spin currents at room temperature in hole-doped silicon, germanium, and gallium arsenide.
- The mechanism enables highly efficient spin injection directly into semiconductor systems without metallic ferromagnetic contacts, supporting low-power information processing and reversible quantum computation.
Cite This Study
Murakami et al. (2003) studied this question.