International Symposium on Carrier Interactions in Mesoscopic Systems

    The symposium was held on February 13th and 14th, 2001, at the NTT Atsugi R&D Center and was organized by New Energy and Industrial Technology Development Organization (NEDO), Core Research for Evolutional Science and Technology - Japan Science and Technology Corporation (CREST-JST), and NTT Basic Research Laboratories.
    Carrier interactions in layer and nano structures have attracted much interest because they will be important to realize novel systems, possibly leading to quantum computing and carrier superfluidity. In this symposium, we tried to cover many areas from science and technology using the single key-word of carrier interactions for classification rather than the more conventional terms, semiconductor, superconductor and device physics. NTT Basic Research Laboratories have led this field, and the aim of the symposium was to gather together leading scientists to discuss the most recent topics.
    Oral sessions consisted of 19 presentations by invited speakers and the main members of the NEDO and CREST collaborating research teams. The plenary presentation for carrier interactions in layer and nano semiconductor systems was given by Prof. K. von Klitzing (Max-Planck-Institut), who discovered the quantized Hall effect and won a Nobel Prize in Physics in 1985. This was followed by theoretical and experimental reports on electron bilayer systems, electron-hole proximity systems, carrier interactions in layer structures, electron spin, and nuclear spin. In particular, electron bilayer systems were highlighted as ideal systems for the study of carrier interactions. Furthermore, recent topics related to spin blockade and the Kondo effect were discussed as examples of carrier interaction effects in quantum dots. Process and growth technologies toward the fabrication of structures suitable for carrier interaction studies and nanoprobe measurements were also presented. Finally, we discussed approaches towards the realization of solid-state quantum computing, which is perhaps the most exciting target for applying carrier interaction effects. Poster sessions consisted of 46 contributed presentations. They covered the fabrication of nano structures, quantum Hall effects, carrier interactions in bilayer systems, Kondo effect in quantum dots, control of electron spin in semiconductors, and proposals for solid-state quantum computation. The number of participants was 142 (97 from outside of NTT). Participants were strongly impressed by the high quality of the symposium.

Plenary presentation by Prof. Klaus von Klitzing (center), welcome address by Dr. Sunao Ishihara, director of NTT Basic Research Laboratories (left), and oral session at the symposium (right).

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