Dynamical spin-electric coupling in a quantum dot

2002/09/21 by Leonid Levitov, L. S. Levitov, E. I. Rashba +1 · 9 citations
Engineering · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Electric field #Electron #Ferromagnetism #Materials science #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #Spin (aerodynamics) #Spin Hall effect #Spin engineering #Spin polarization #Spinplasmonics #Spintronics #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.67.115324

published as Phys. Rev. B 67, 115324 (2003) · 4 pages, 2 figures

arxiv created 2002/09/21 · openalex publication_date 2003/03/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Due to the spin-orbital coupling in an anisotropic semiconductor quantum dot, a freely precessing electron spin produces a time-dependent charge density. This creates a sizable electric field outside the dot, leading to promising applications in spintronics. The spin-electric coupling can be employed for noninvasive single-spin detection by electrical methods. We also consider a spin relaxation mechanism due to long-range coupling to electrons in gates and elsewhere in the system, and find a contribution comparable to, and in some cases dominant over, previously discussed mechanisms.

Citations

• Ground State Spin and Coulomb Blockade Peak Motion in Chaotic Quantum Dots
• Magnetically Induced Reconstruction of the Ground State in a Few-Electron Si Quantum Dot

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