Author Affiliations

Yuki Doi,^* Toshiharu Makino,^** Hiromitsu Kato,^** Masahiko Ogura,^** Daisuke Takeuchi,^** Hideyo Okushi,^** Satoshi Yamasaki,^** Jörg Wrachtrup,^*** Shinji Miwa,^* Yoshishige Suzuki,^* and Norikazu Mizuochi^*

^*Osaka University, Osaka, Japan

^**National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan

^***Universität Stuttgart, Stuttgart, Germany