6 papers
The Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System
S. M. Cronenwett, H. J. Lynch, D. Goldhaber-Gordon +5
Besides the usual conductance plateaus at multiples of 2e2/h, quantum point contacts typically show an extra plateau at ~ 0.7(2e2/h), believed to arise from electron-electron inter…
Mesoscopic Coulomb Blockade in One-channel Quantum Dots
S. M. Cronenwett, S. M. Maurer, S. R. Patel +3
Signatures of "mesoscopic Coulomb blockade" are reported for quantum dots with one fully transmitting point-contact lead, T1 = 1, T2 << 1. Unlike Coulomb blockade (CB) in weak-tunn…
A Tunable Kondo Effect in Quantum Dots
Sara M. Cronenwett, Tjerk H. Oosterkamp, Leo P. Kouwenhoven
We demonstrate a tunable Kondo effect realized in small quantum dots. We can switch our dot from a Kondo impurity to a non-Kondo system as the number of electrons on the dot is cha…
Statistics of Coulomb Blockade Peak Spacings
S. R. Patel, S. M. Cronenwett, D. R. Stewart +6
Distributions of Coulomb blockade peak spacing are reported for large ensembles of both unbroken (magnetic field B = 0) and broken (B <> 0) time reversal symmetry in GaAs quantum d…
Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots
S. M. Cronenwett, S. R. Patel, C. M. Marcus +2
We report measurements of mesoscopic fluctuations of elastic cotunneling in Coulomb blockaded quantum dots. Unlike resonant tunneling on Coulomb peaks, cotunneling in the valleys i…
Quantum Chaos in Open versus Closed Quantum Dots: Signatures of Interacting Particles
C. M. Marcus, S. R. Patel, A. G. Huibers +8
This paper reviews recent studies of mesoscopic fluctuations in transport through ballistic quantum dots, emphasizing differences between conduction through open dots and tunneling…