Abstract

Individual quantum dots are often referred to as “artificial atoms.” Two tunnel-coupled quantum dots can be considered an “artificial molecule.” Low-temperature measurements were made on a series double quantum dot with adjustable interdot tunnel conductance that was fabricated in a gallium arsenide-aluminum gallium arsenide heterostructure. The Coulomb blockade was used to determine the ground-state charge configuration within the “molecule” as a function of the total charge on the double dot and the interdot polarization induced by electrostatic gates. As the tunnel conductance between the two dots is increased from near zero to 2 e 2 / h (where e is the electron charge and h is Planck's constant), the measured conductance peaks of the double dot exhibit pronounced changes in agreement with many-body theory.

Keywords

Quantum dotCoulomb blockadeGallium arsenideConductanceCondensed matter physicsPhysicsCharge (physics)ElectronHeterojunctionCoulombGround statePolarization (electrochemistry)Atomic physicsChemistryQuantum mechanicsTransistorVoltage

Affiliated Institutions

Related Publications

Publication Info

Year
1996
Type
article
Volume
274
Issue
5291
Pages
1332-1335
Citations
272
Access
Closed

External Links

View on DOI.org

Social Impact

Altmetric
PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

272
OpenAlex

Cite This

Carol Livermore, Catherine H. Crouch, R. M. Westervelt et al. (1996). The Coulomb Blockade in Coupled Quantum Dots. Science , 274 (5291) , 1332-1335. https://doi.org/10.1126/science.274.5291.1332

Identifiers

DOI
10.1126/science.274.5291.1332