Disentangling the effects of spin-orbit and hyperfine interactions on spin blockade

Article

关键词: SINGLE-ELECTRON SPIN;    DOUBLE-QUANTUM DOT;   

DOI  :  10.1103/PhysRevB.81.201305

来源: SCIE

【 摘 要 】

We have achieved the few-electron regime in InAs nanowire double quantum dots. Spin blockade is observed for the first two half-filled orbitals, where the transport cycle is interrupted by forbidden transitions between triplet and singlet states. Partial lifting of spin blockade is explained by spin-orbit and hyperfine mechanisms that enable triplet to singlet transitions. The measurements over a wide range of interdot coupling and tunneling rates to the leads are well reproduced by a simple transport model. This allows us to separate and quantify the contributions of the spin-orbit and hyperfine interactions.

【 授权许可】

Free