Real-space computational methods for linear and nonlinear polarizabilities. - Jun-ichi Iwata; Kazuhiro Yabana; George F. Bertsch (J. Comput. Methods Sci. Eng., 2004)

A massively-parallel electronic-structure calculations based on real-space density functional theory. - Jun-ichi Iwata; Daisuke Takahashi; Atsushi Oshiyama; Taisuke Boku; Kenji Shiraishi; Susumu Okada; Kazuhiro Yabana (J. Comput. Phys., 2010)

First-principles calculations of electron states of a silicon nanowire with 100, 000 atoms on the K computer. - Yukihiro Hasegawa; Jun-ichi Iwata; Miwako Tsuji; Daisuke Takahashi; Atsushi Oshiyama; Kazuo Minami; Taisuke Boku; Fumiyoshi Shoji; Atsuya Uno; Motoyoshi Kurokawa; Hikaru Inoue; Ikuo Miyoshi; et al. (SC, 2011)

Si nanowire FET and its modeling. - Hiroshi Iwai; Kenji Natori; Kenji Shiraishi; Jun-ichi Iwata; Atsushi Oshiyama; Keisaku Yamada; Kenji Ohmori; Kuniyuki Kakushima; Parhat Ahmet (Sci. China Inf. Sci., 2011)

Real-time and real-space density functional calculation for electron dynamics in crystalline solids. - Kazuhiro Yabana; Yasushi Shinohara; Tomohito Otobe; Jun-ichi Iwata; George F. Bertsch (ICCS, 2011)

Efficient Algorithm for Linear Systems Arising in Solutions of Eigenproblems and Its Application to Electronic-Structure Calculations. - Yasunori Futamura; Tetsuya Sakurai; Shinnosuke Furuya; Jun-ichi Iwata (VECPAR, 2012)

Performance evaluation of ultra-large-scale first-principles electronic structure calculation code on the K computer. - Yukihiro Hasegawa; Jun-ichi Iwata; Miwako Tsuji; Daisuke Takahashi; Atsushi Oshiyama; Kazuo Minami; Taisuke Boku; Hikaru Inoue; Yoshito Kitazawa; Ikuo Miyoshi; Mitsuo Yokokawa (Int. J. High Perform. Comput. Appl., 2014)

A Communication Avoiding and Reducing Algorithm for Symmetric Eigenproblem for Very Small Matrices. - Takahiro Katagiri; Jun-ichi Iwata; Kazuyuki Uchida (CoRR, 2024)