●　グラフェンにおいてスピンとバレーの新しい電荷中性流を発見

M. Tanaka, Y. Shimazaki, I. V. Borzenets, K. Watanabe, T. Taniguchi, S. Tarucha, and M. Yamamoto, “Charge Neutral Current Generation in a Spontaneous Quantum Hall Antiferromagnet”, Phys. Rev. Lett. 126, 016801 (2021).

M. Tanaka, K. Watanabe, T. Taniguchi, K. Nomura, S. Tarucha, M. Yamamoto, “Temperature-induced phase transitions in the correlated quantum Hall state of bilayer graphene”, Phys. Rev. B105, 075427 (2022).

 

●　単一伝搬電子による初めての軌道量子ビットを実現

R. Ito, S. Takada, A. Ludwig, A. D. Wieck, S. Tarucha, and M. Yamamoto, “Coherent beam splitting of flying electrons driven by a surface acoustic wave”, Phys. Rev. Lett. 126, 070501 (2021).

 

●　局在スピンを遮蔽する伝導電子の量子物体「近藤遮蔽雲」を初めて観察

I. V. Borzenets, J. Shim, J. C. H. Chen, A. Ludwig, A. D. Wieck, S. Tarucha, H.-S. Sim, and M. Yamamoto, “Observation of the Kondo screening cloud”, Nature 579, 210-213 (2020).

 

●　人工原子による電子波の散乱位相が人工原子内の電子軌道を反映する様子を初めて観測

S. Takada, M. Yamamoto, C. Bäuerle, A. Ludwig, A. D. Wieck, and S. Tarucha,  “Mesoscopic phase behavior in a quantum dot around crossover between single-level and multilevel transport regimes”, Phys. Rev. B 95, 241301 (RC) (2017).

H. Edlbauer, S. Takada, G. Roussely, M. Yamamoto, S. Tarucha, A. Ludwig, A. D. Wieck, T. Meunier and C. Bäuerle, “Non-universal transmission phase behaviour of a large quantum dot”, Nature Communications 8, 1710 (2017).

 

●　量子ホール状態を介した超伝導流を観測

F. Amet, C. T. Ke, I. V. Borzenets, Y-M. Wang, K. Watanabe, T. Taniguchi, R. S. Deacon, M. Yamamoto, Y. Bomze, S. Tarucha, G. Finkelstein, “Supercurrent in the quantum Hall regime”, Science 382, 966-969 (2016).

 

●　電子１個のスピン情報の長距離伝送・検出に成功

B. Bertrand, S. Hermelin, S. Takada, M. Yamamoto, S. Tarucha, A. Ludwig, A. D. Wieck, C. Bäuerle, and T. Meunier, “Fast spin information transfer between distant quantum dots using individual electrons”, Nature Nanotechnology 11, 672-676 (2016).

 

●　二層グラフェンでバレー流の生成、検出に成功

Y. Shimazaki, M. Yamamoto, I. V. Borzenets, K. Watanabe, T. Taniguchi, and S. Tarucha, “Generation and detection of pure valley current by electrically induced Berry curvature in bilayer graphene”, Nature Physics11, 1032-1036 (2015).

 

●　近藤一重項状態を位相測定によって確認

S. Takada, C. Bäuerle, M. Yamamoto, K. Watanabe, S. Hermelin, T. Meunier, A. Alex, A. Weichselbaum, J. von Delft, A. D. Wieck and S. Tarucha, “Transmission phase in the Kondo regime revealed in a two-path interferometer”, Phys. Rev. Lett. 113, 126601 (2014).

 

●　集積可能な電子の2経路干渉計を実現　 ―量子情報の長距離伝送や高速制御へ―

Michihisa Yamamoto, Shintaro Takada, Christopher Bäuerle, Kenta Watanabe, Andreas D. Wieck and Seigo Tarucha, “Electrical control of a solid-state flying qubit”, Nature Nanotechnology 7, 247-251 (2012).

 

●　単一電子を周囲の電子から孤立させて移送・検出する技術を開発

Sylvain Hermelin, Shintaro Takada, Michihisa Yamamoto, Seigo Tarucha, Andreas D. Wieck, Laurent Saminadayar, Christopher Bäuerle and Tristan Meunier, “Electron surfing on a sound wave as a platform for quantum optics with flying electrons”, Nature 477, 435-438 (2011).

 

●　ABA積層構造を持つ3層グラフェンが半金属であることを実験で確認

M. F. Craciun, S. Russo, M. Yamamoto, J. B. Oostinga, A. F. Morpurgo and S. Tarucha, “Trilayer graphene is a semimetal with a gate-tunable band overlap”, Nature Nanotechnology 4, 383 - 388 (2009).

 

●　結合量子細線におけるクーロンドラッグの測定によって固体のウィグナー結晶状態を検出

M. Yamamoto, M. Stopa, Y. Hirayama, Y. Tokura, and S. Tarucha, “Negative Coulomb Drag in a One-Dimensional Wire”, Science 313, 204-207 (2006).