Conditions for quantized current in quantum dot turnstile

Tsuyoshi Hatano, Yoshimasa Isawa

Research output: Contribution to journalArticlepeer-review


Competition between leak and quantized currents leads to the breakdown of the current quantization as the frequency f of RF signal is smaller than the tunneling rate Γleak We find that when f > Γleak, the dc current is quantized, while the much larger current than quantized current flows through the dot when f < Γleak. We also find new fine structures in the current plateaus resulting from the quantized level spacing ΔE. These structures are washed out at the temperature kBT ~ ΔE, though the quantized plateaus remain. The quantized plateaus are washed out at kBT ~ e2/C, where C is the capacitance of the dot.

Original languageEnglish
Pages (from-to)2419-2420
Number of pages2
JournalCzechoslovak Journal of Physics
Issue numberSUPPL. 4
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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