Imaging a single-electron quantum dot.
Images of a single-electron quantum dot were obtained in the Coulomb blockade regime at liquid He temperatures using a cooled scanning probe microscope (SPM). The charged SPM tip shifts the lowest energy level in the dot and creates a ring in the image corresponding to a peak in the Coulomb-blockade conductance. Fits to the line shape of the ring determine the tip-induced shift of the energy of the electron state in the dot. SPM manipulation of electrons in quantum dots promises to be useful in understanding, building, and manipulating circuits for quantum information processing.
Fallahi
Parisa
P
Division of Engineering and Applied Sciences, Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Bleszynski
Ania C
AC
Westervelt
Robert M
RM
Huang
Jian
J
Walls
Jamie D
JD
Heller
Eric J
EJ
Hanson
Micah
M
Gossard
Arthur C
AC
D001152:Arsenicals / Q000737:chemistry* / Q000528:radiation effects; D004735:Energy Transfer; D005615:Freezing; D005708:Gallium / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008422:Materials Testing / Q000379:methods*; D020527:Microscopy, Scanning Probe / Q000379:methods*; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry / Q000528:radiation effects* / Q000648:ultrastructure*; D010316:Particle Size; D045663:Quantum Dots
D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium