Evolution of the Kondo effect in a quantum dot probed by shot noise

Yoshiaki Yamauchi, Koji Sekiguchi, Kensaku Chida, Tomonori Arakawa, Shuji Nakamura, Kensuke Kobayashi, Teruo Ono, Tatsuya Fujii, Rui Sakano

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

We measure the current and shot noise in a quantum dot in the Kondo regime to address the nonequilibrium properties of the Kondo effect. By systematically tuning the temperature and gate voltages to define the level positions in the quantum dot, we observe an enhancement of the shot noise as temperature decreases below the Kondo temperature, which indicates that the two-particle scattering process grows as the Kondo state evolves. Below the Kondo temperature, the Fano factor defined at finite temperature is found to exceed the expected value of unity from the noninteracting model, reaching 1.8±0.2.

Original languageEnglish
Article number176601
JournalPhysical Review Letters
Volume106
Issue number17
DOIs
Publication statusPublished - 2011 Apr 26
Externally publishedYes

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Kondo effect
shot noise
quantum dots
temperature
unity
tuning
augmentation
electric potential
scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Yamauchi, Y., Sekiguchi, K., Chida, K., Arakawa, T., Nakamura, S., Kobayashi, K., ... Sakano, R. (2011). Evolution of the Kondo effect in a quantum dot probed by shot noise. Physical Review Letters, 106(17), [176601]. https://doi.org/10.1103/PhysRevLett.106.176601

Evolution of the Kondo effect in a quantum dot probed by shot noise. / Yamauchi, Yoshiaki; Sekiguchi, Koji; Chida, Kensaku; Arakawa, Tomonori; Nakamura, Shuji; Kobayashi, Kensuke; Ono, Teruo; Fujii, Tatsuya; Sakano, Rui.

In: Physical Review Letters, Vol. 106, No. 17, 176601, 26.04.2011.

Research output: Contribution to journalArticle

Yamauchi, Y, Sekiguchi, K, Chida, K, Arakawa, T, Nakamura, S, Kobayashi, K, Ono, T, Fujii, T & Sakano, R 2011, 'Evolution of the Kondo effect in a quantum dot probed by shot noise', Physical Review Letters, vol. 106, no. 17, 176601. https://doi.org/10.1103/PhysRevLett.106.176601
Yamauchi Y, Sekiguchi K, Chida K, Arakawa T, Nakamura S, Kobayashi K et al. Evolution of the Kondo effect in a quantum dot probed by shot noise. Physical Review Letters. 2011 Apr 26;106(17). 176601. https://doi.org/10.1103/PhysRevLett.106.176601
Yamauchi, Yoshiaki ; Sekiguchi, Koji ; Chida, Kensaku ; Arakawa, Tomonori ; Nakamura, Shuji ; Kobayashi, Kensuke ; Ono, Teruo ; Fujii, Tatsuya ; Sakano, Rui. / Evolution of the Kondo effect in a quantum dot probed by shot noise. In: Physical Review Letters. 2011 ; Vol. 106, No. 17.
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