Single-Electron Charging in Double and Triple Quantum Dots with Tunable Coupling

Abstract

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.

Keywords

Coulomb blockadeQuantum dotQuantum tunnellingCondensed matter physicsConductanceCoupling (piping)PhysicsCapacitanceElectronQuasiperiodic functionTunnel effectMaterials scienceOptoelectronicsVoltageQuantum mechanicsTransistor

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Publication Info

Year: 1995
Type: article
Volume: 75
Issue: 4
Pages: 705-708
Citations: 473
Access: Closed

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APA Style

                            
                                
                                    F. R. Waugh, 
                                
                                    M. J. Berry, 
                                
                                    D. J. Mar
                                
                                et al.
                            
                            (1995). 
                            Single-Electron Charging in Double and Triple Quantum Dots with Tunable Coupling. 
                            Physical Review Letters
                            , 75
                            (4)
                            , 705-708.
                            https://doi.org/10.1103/physrevlett.75.705
                        

Identifiers

DOI: 10.1103/physrevlett.75.705