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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  kyouindb  KAKEN_id
Chiba, Daichi
Ono, Teruo  kyouindb  KAKEN_id
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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