Imaging a 1-electron InAs quantum dot in an InAs/InP nanowire

Abstract

Nanowire heterostructures define high-quality few-electron quantum dots for nanoelectronics, spintronics and quantum information processing. We use a cooled scanning probe microscope (SPM) to image and control an InAs quantum dot in an InAs/InP nanowire, using the tip as a movable gate. Images of dot conductance vs. tip position at T = 4.2 K show concentric rings as electrons are added, starting with the first electron. The SPM can locate a dot along a nanowire and individually tune its charge, abilities that will be very useful for the control of coupled nanowire dots.

References in corpus (1)

• Tunable effective g-factor in InAs nanowire quantum dots

Cited by in corpus (2)

• Spin-Electric Coupling in Molecular Magnets
• Detection of interaction-induced nonlocal effects using perfectly transmitting nanostructures