MODULATION OF COULOMB-BLOCKADE OSCILLATIONS BY COHERENT RESONANT-TUNNELING

Authors
HEINZEL T MANUS S WHARAM DA KOTTHAUS JP BOHM G KLEIN W TRANKLE G WEIMANN G
Citation
T. Heinzel et al., MODULATION OF COULOMB-BLOCKADE OSCILLATIONS BY COHERENT RESONANT-TUNNELING, Europhysics letters, 26(9), 1994, pp. 689-694
Citations number
17
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
26
Issue
9
Year of publication
1994
Pages
689 - 694
Database
ISI
SICI code
0295-5075(1994)26:9<689:MOCOBC>2.0.ZU;2-U
Abstract
Coulomb blockade oscillations of the conductance of a quantum dot defi ned in a two-dimensional electron gas are investigated. At low tempera tures, a dramatic modulation of the peak conductances is found at zero magnetic field. This modulation is attributed to current-carrying ele ctrons that tunnel through the dot coherently giving rise to resonance s in the transmission. Temperature-dependent measurements indicate tha t the strength of the modulation is determined by the thermal smearing of the Fermi function.