Buried nanomagnet realizing high-speed/low-variability silicon spin qubits: implementable in error-correctable large-scale quantum computers. - Shota Iizuka; Kimihiko Kato; Atsushi Yagishita; Hidehiro Asai; Tetsuya Ueda; Hiroshi Oka; Junichi Hattori; Tsutomu Ikegami; Koichi Fukuda; Takahiro Mori (VLSI Circuits, 2021)