STM Control of Noninteger Residual Charge Q0 on the Central Electrode of a Double-Tunnel Junction

Zhao Yan Rong, Alejandro Chang, Lesley F. Cohen, E. L. Wolf

Research output: Contribution to journalArticle


In a voltage-biased mesoscopic double-tunnel junction, the Coulomb threshold Vc is an e-periodic function of Q0, the charge on the inner electrode. In our STM work, a large Au tip images 100 A Ag particles deposited on a cleaved BSCCO crystal substrate. Stable double junctions between the tip, the imaged particle, and the substrate are identified by Coulomb staircase I(V)‘s. The control of Q0 is demonstrated by the variation of tip-particle spacing. The parameterization of such results permits a discussion of Q0 variation mechanisms.

Original languageEnglish (US)
Pages (from-to)67-70
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number1
StatePublished - Jan 1992


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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