5 papers
Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
E. A. Laird, J. R. Petta, A. C. Johnson +4
We measure singlet-triplet dephasing in a two-electron double quantum dot in the presence of an exchange interaction which can be electrically tuned from much smaller to much large…
Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot
A. C. Johnson, J. R. Petta, C. M. Marcus +2
Singlet-triplet spin blockade in a few-electron lateral double quantum dot is investigated using simultaneous transport and charge-sensing measurements. Transport from the (1,1) to…
Latched Detection of Excited States in an Isolated Double Quantum Dot
A. C. Johnson, C. M. Marcus, M. P. Hanson +1
Pulsed electrostatic gating combined with capacitive charge sensing is used to perform excited state spectroscopy of an electrically isolated double-quantum-dot system. The tunneli…
Coulomb-Modified Fano Resonance in a One-Lead Quantum Dot
A. C. Johnson, C. M. Marcus, M. P. Hanson +1
We investigate a tunable Fano interferometer consisting of a quantum dot coupled via tunneling to a one-dimensional channel. In addition to Fano resonance, the channel shows strong…
Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot
L. DiCarlo, H. J. Lynch, A. C. Johnson +5
We report measurements of a tunable double quantum dot, operating in the quantum regime, with integrated local charge sensors. The spatial resolution of the sensors is sufficient t…