title: Single-Shot Ternary Readout of Two-Electron Spin States in a Quantum Dot Using Spin Filtering by Quantum Hall Edge States.
abstract: We report on the single-shot readout of three two-electron spin states-a singlet and two triplet substates-whose z components of spin angular momentum are 0 and +1, in a gate-defined GaAs single quantum dot. The three spin states are distinguished by detecting spin-dependent tunnel rates that arise from two mechanisms: spin filtering by spin-resolved edge states and spin-orbital correlation with orbital-dependent tunneling. The three states form one ground state and two excited states, and we observe the spin relaxation dynamics among the three spin states.
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kiyama
authors.affiliation: Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakajima
authors.affiliation: Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-8656, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Teraoka
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan.|Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Oiwa
authors.affiliation: Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.|Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-8656, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Tarucha