Tunneling current spectroscopy of a nanostructure junction involving multiple energy levels

David M.T. Kuo, Yia Chung Chang

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

A multilevel Anderson model is employed to simulate the system of a nanostructure tunnel junction with any number of one-particle energy levels. The tunneling current, including both shell-tunneling and shell-filling cases, is theoretically investigated via the nonequilibrium Green's function method. We obtain a closed form for the spectral function, which is used to analyze the complicated tunneling current spectra of a quantum dot or molecule embedded in a double-barrier junction. We also show that negative differential conductance can be observed in a quantum dot tunnel junction when the Coulomb interactions with neighboring quantum dots are taken into account.

Original languageEnglish
Article number086803
JournalPhysical Review Letters
Volume99
Issue number8
DOIs
StatePublished - 21 Aug 2007

Fingerprint

Dive into the research topics of 'Tunneling current spectroscopy of a nanostructure junction involving multiple energy levels'. Together they form a unique fingerprint.

Cite this