Single-electron charging in double and triple quantum dots with tunable coupling

F. R. Waugh, M. J. Berry, D. J. Mar, R. M. Westervelt, K. L. Campman, A. C. Gossard

Research output: Contribution to journalArticlepeer-review

474 Scopus citations


We report low-temperature tunneling measurements at zero magnetic field through double and triple quantum dots with adjustable interdot coupling, fabricated in a GaAs/AlGaAs heterostructure. As the coupling is increased, Coulomb blockade conductance peaks split into two (double dot) or three (triple dot) peaks each. The splitting tracks closely the measured tunnel conductance and experimentally determines the total interaction energy. Coupled double and triple dots with different gate capacitance show quasiperiodic beating.

Original languageEnglish (US)
Pages (from-to)705-708
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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