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PhysRevB.87.155313.pdf | 837.01 kB | Adobe PDF | 見る/開く |
タイトル: | Observation of finite excess noise in the voltage-biased quantum Hall regime as a precursor for breakdown |
著者: | Chida, Kensaku Arakawa, Tomonori Matsuo, Sadashige Nishihara, Yoshitaka Tanaka, Takahiro https://orcid.org/0000-0001-8406-5183 (unconfirmed) Chiba, Daichi Ono, Teruo Hata, Tokuro Kobayashi, Kensuke Machida, Tomoki |
著者名の別形: | 知田, 健作 |
発行日: | Apr-2013 |
出版者: | American Physical Society |
誌名: | Physical Review B |
巻: | 87 |
号: | 15 |
論文番号: | 155313 |
抄録: | We performed noise measurements in a two-dimensional electron gas to investigate the nonequilibrium quantum Hall effect (QHE) state. While excess noise is perfectly suppressed around the zero-biased QHE state reflecting the dissipationless electron transport of the QHE state, considerable finite excess noise is observed in the breakdown regime of the QHE. The noise temperature deduced from the excess noise is found to be of the same order as the energy gap between the highest occupied Landau level and the lowest empty one. Moreover, unexpected finite excess noise is observed at a finite source-drain bias voltage smaller than the onset voltage of the QHE breakdown, which indicates finite dissipation in the QHE state and may be related to the prebreakdown of the QHE. |
著作権等: | ©2013 American Physical Society |
URI: | http://hdl.handle.net/2433/174252 |
DOI(出版社版): | 10.1103/PhysRevB.87.155313 |
出現コレクション: | 学術雑誌掲載論文等 |
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