Robust micromagnet design for fast electrical manipulations of single spins in quantum dots

Jun Yoneda, Tomohiro Otsuka, Tatsuki Takakura, Michel Pioro-Ladrière, Roland Brunner, Hong Lu, Takashi Nakajima, Toshiaki Obata, Akito Noiri, Christopher J. Palmstrøm, Arthur C. Gossard, Seigo Tarucha

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Tailoring spin coupling to electric fields is central to spintronics and spin-based quantum information processing. We present an optimal micromagnet design that produces appropriate stray magnetic fields to mediate fast electrical spin manipulations in nanodevices. We quantify the practical requirements for spatial field inhomogeneity and tolerance for misalignment with spins, and propose a design scheme to improve the spin-rotation frequency (to exceed 50 MHz in GaAs nanostructures). We then validate our design by experiments in separate devices. Our results will open a route to rapidly control solid-state electron spins with limited lifetimes and to study coherent spin dynamics in solids.

Original languageEnglish
Article number084401
JournalApplied Physics Express
Volume8
Issue number8
DOIs
Publication statusPublished - 2015 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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