Dynamical spin-electric coupling in a quantum dot

Details Dynamical spin-electric coupling in a quantum dot Dynamical spin-electric coupling in a quantum dot

2002-09-21

arxiv.org/abs/cond-mat/0209507v1

Phys. Rev. B 67, 115324 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.67.115324

Due to the spin-orbital coupling in a semiconductor quantum dot, a freely precessing electron spin produces a time-dependent charge density. This creates a sizeable electric field outside the dot, leading to promising applications in spintronics. The spin-electric coupling can be employed for non-invasive 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.

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