- 著者
- Tsutsumi Naotaka Kimura Takeshi Arita Kyohei Ariyoshi Mariko Ohnishi Hidenori Yamamoto Takahiro Zuo Xiaobing Maenaka Katsumi Park Enoch Y Kondo Naomi Shirakawa Masahiro Tochio Hidehito Kato Zenichiro
- 出版者
- Nature Publishing Group
- 雑誌
- Nature communications (ISSN:20411723)
- 巻号頁・発行日
- vol.5, 2014-12-15
- 被引用文献数
- 92
免疫・神経難治疾患の治療薬開発を促進するインターロイキン18複合体立体構造を解明. 京都大学プレスリリース. 2014-12-16.
- 著者
- Sasaoka Kenji Yamamoto Takahiro Watanabe Satoshi Shiraishi Kenji
- 出版者
- American Physical Society
- 雑誌
- Physical review B (ISSN:10980121)
- 巻号頁・発行日
- vol.84, no.12, pp.125403, 2011-09
- 被引用文献数
- 5
The alternating-current response of a quantum point contact (QPC) is numerically investigated using the nonequilibrium Green function method combined with an effective mass theory. We found that the susceptance of a QPC increases stepwise with increasing gate voltage, when the width of the quantization plateau in the gate voltage-conductance curve is narrower than the width of the region where the conductance changes gradually. We also show that the height of a susceptance step is proportional to the ac-bias frequency. These simulation results are in excellent qualitative agreement with recent experimental results. Moreover, we found that the transition from capacitive susceptance to inductive susceptance occurs with increasing gate voltage. The capacitive-inductive transition point is independent of the ac-bias frequency, but it does depend on the contact width.