Chaotic behavior in the magneto-resistance of quantum dot and quantum point contact

Yuichi Ochiai, Yohei Ujiie, Noboru Yumoto, Shigeki Harada, Takahiro Morimoto, Nobuyuki Aoki, Jonathan P. Bird, David K. Ferry

Research output: Contribution to journalArticlepeer-review

Abstract

We have investigated quantum structures, such as narrow wires, single or coupled quantum dots (QDs), and quantum point contact (QPC), in order to clarify the origin of the chaotic and fractal behavior in their transport properties. Chaotic behavior in the electrical transport in QD and QPC has been studied in the low temperature magneto-resistance (MR), and by use of scanning gate microscopy (SGM). The quantum structures are fabricated using hetero-junction semiconductors. The low temperature MR has been measured using a 3He cryostat or dilution refrigerator with magnetic fields up to 8 T. We discuss the relation between the narrow constrictions in these structures and chaotic scatterings observed in the MR and SGM.

Original languageEnglish (US)
Pages (from-to)127-135
Number of pages9
JournalProgress of Theoretical Physics Supplement
Issue number166
DOIs
StatePublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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