Single-Shot Ternary Readout of Two-Electron Spin States in a Quantum Dot Using Spin Filtering by Quantum Hall Edge States

H. Kiyama, T. Nakajima, S. Teraoka, A. Oiwa, S. Tarucha

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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.

Original languageEnglish
Article number236802
JournalPhysical review letters
Volume117
Issue number23
DOIs
Publication statusPublished - Nov 29 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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