Letter abstract


Nature Physics 4, 776 - 779 (2008)
Published online: 17 August 2008 | doi:10.1038/nphys1053

Subject Categories: Quantum physics | Electronics, photonics and device physics | Techniques and instrumentation

Electrically driven single-electron spin resonance in a slanting Zeeman field

M. Pioro-Ladrière1, T. Obata1, Y. Tokura1,2, Y.-S. Shin1, T. Kubo1, K. Yoshida1, T. Taniyama3,4 & S. Tarucha1,5,6

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The rapid rise of spintronics and quantum information science has led to a strong interest in developing the ability to coherently manipulate electron spins1. Electron spin resonance2 is a powerful technique for manipulating spins that is commonly achieved by applying an oscillating magnetic field. However, the technique has proven very challenging when addressing individual spins3, 4, 5. In contrast, by mixing the spin and charge degrees of freedom in a controlled way through engineered non-uniform magnetic fields, electron spin can be manipulated electrically without the need of high-frequency magnetic fields6, 7. Here we report experiments in which electrically driven addressable spin rotations on two individual electrons were realized by integrating a micrometre-size ferromagnet into a double-quantum-dot device. We find that it is the stray magnetic field of the micromagnet that enables the electrical control and spin selectivity. The results suggest that our approach can be tailored to multidot architecture and therefore could open an avenue towards manipulating electron spins electrically in a scalable way.

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  1. Quantum Spin Information Project, ICORP, Japan Science and Technology Agency, Atsugi-shi, 243-0198, Japan
  2. NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, 243-0198, Japan
  3. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, 226-8503, Japan
  4. PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
  5. Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
  6. Institute for Nano Quantum Information Electronics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan

Correspondence to: M. Pioro-Ladrière1 e-mail: michel@tarucha.jst.go.jp



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