Photon-induced conductance steps and in situ modulation of disorder in mesoscopic electron systems

Neil Beattie, Beata Kardynał, Andrew Shields, Ian Farrer, David Ritchie, Michael Pepper

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We study the conductance of a disordered two-dimensional electron system (2DES) at a mesoscopic length scale in which the localization length can be controlled and varied during an experiment. The localization is induced by a quantum dot layer adjacent to the 2DES, whose charge occupancy can be controlled optically. Under illumination the 2DES conductance increases in sharp steps due to the discharging of individual dots by single photo-excited holes. As the 2DES localization length increases, electron transport evolves from hopping through a small network to direct tunneling across the sample.
Original languageEnglish
JournalPhysical Review B
Volume70
Issue number8
DOIs
Publication statusPublished - 2004

Fingerprint

Dive into the research topics of 'Photon-induced conductance steps and in situ modulation of disorder in mesoscopic electron systems'. Together they form a unique fingerprint.

Cite this