Spectroscopy of Ground and Excited States of the Confined Electron System in a Quantum Dot by Electrical Transport Measurements

Excited states of the confined electron system in a quantum dot offer additional transport channels for single-electron tunneling. © MPI-FKF / J. Weis

The method of transport spectroscopy allows investigating the charging energies required to add an electron to the electron system confined in the quantum dot. Increasing the number of confined electrons, the transition from few to many electrons can be studied, revealing correlation effects between the electrons which are more pronounced than in real atoms due to the stronger influence of electron-electron interaction. Especially the evolution of single-electron charging energies to ground and excited states of the confined electron system with applied magnetic field gives further insight.

Publications

Transport spectroscopy of a confined electron-system under a gate tip
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
Physical Review B 46, 12837 (1992)

Magnetotransport investigations of a quantum-dot with a small number of electrons
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
Physica B 189, 111 (1993)

Competing channels in single-electron tunneling through a quantum-dot
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
Physical Review Letters 71, 4019 (1993)

Lateral transport through a single quantum-dot with a magnetic-field parallel to the current
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
Surface Science 305, 1 (1994)

Transport spectroscopy on a single quantum-dot
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
Semiconductor Science and Technology 9, 1890 (1994)

Transport experiments on a quantum dot
J. Weis, R.J. Haug, K. von Klitzing, K. Ploog
in Quantum Dynamics of Submicron Structures
Book Series: NATO ADVANCED SCIENCE INSTITUTES SERIES E, APPLIED SCIENCES 291, 263-274 (1995)

Single-electron devices (pdf)
J. Weis
Springer Lecture Series – CFN Lectures on Functional Nanostructures 658, 87-121 (2005)

Theses

Einzelelektron-Tunneltransistor: Transportspektroskopie der elektronischen Grund-
und Anregungszustände in einem GaAs/Al_xGa_1-x As-Quantentopf
Jürgen Weis, Dissertation, Universität Stuttgart (1994)

Electrical Transport Through Quantum Dot Systems (pdf)
Jürgen Weis, Habilitation Thesis, Universität Stuttgart (2002)