Transport characteristics of series ballistic point contacts

Y. Hirayama, T. Saku

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


A double ballistic point contact (D-BPC) structure, where two point contacts are placed in series with a separation of Lsp, is fabricated by focused Ga-ion beam scanning. Conductance characteristics for an Lsp=200 nm sample show multiple peaks in their gate-bias dependences. These peaks probably originate from ballistic transport through zero-dimensional levels. The Lsp=400 and 800 nm samples show step structures similar to those of a single point contact. Although plateau resistance values differ from the quantized values (Rn) with a zero magnetic field, it is found that they approach Rn as the magnetic field increases.

Original languageEnglish
Pages (from-to)2927-2930
Number of pages4
JournalPhysical Review B
Issue number5
Publication statusPublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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