Electron Number Dependence of Spin Triplet-Singlet Relaxation Time

2012/05/07 by Gang Cao, Ming Xiao, Cao, Gang +9
Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.1205.1264

arxiv created 2012/05/07 · openalex publication_date 2012/05/07 · arxiv updated 2012/05/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In a GaAs single quantum dot, the relaxation time T₁ between spin triplet and singlet states has been measured for the last few even number of electrons. The singlet-triplet energy separation E_ST is tuned as a control parameter for the comparison of T₁ between different electron numbers. T₁ shows a steady decrease from 2-electrons, 4-electrons, to 6-electrons, and we found this implies an enhancement of the spin-orbital coupling strength in a multi-electron quantum dot.

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