2011/10/31 by J. R. Prance, Zhan Shi, C. B. Simmons +10
Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Atomic physics #Charge (physics) #Condensed matter physics #Electron #Excited state #Field (mathematics) #Mathematics #Pauli exclusion principle #Physics #Quantum and electron transport phenomena #Quantum mechanics #Relaxation (psychology) #Semiconductor materials and devices #Singlet state #Spin (aerodynamics) #Thermodynamics #Zero (linguistics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.108.046808
published as Phys. Rev. Lett. 108, 046808 (2012) · 4 pages, 3 figures, supplemental information. Typos fixed; updated to submitted version
arxiv created 2011/11/02 · openalex publication_date 2012/01/26 · arxiv updated 2013/08/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the lifetime of two-electron spin states in a few-electron Si/SiGe double dot. At the transition between the (1,1) and (0,2) charge occupations, Pauli spin blockade provides a readout mechanism for the spin state. We use the statistics of repeated single-shot measurements to extract the lifetimes of multiple states simultaneously. When the magnetic field is zero, we find that all three triplet states have equal lifetimes, as expected, and this time is ~10 ms. When the field is nonzero, the T(0) lifetime is unchanged, whereas the T- lifetime increases monotonically with the field, reaching 3 sec at 1 T.