CONDUCTANCE FLUCTUATIONS IN A QUANTUM-DOT IN THE TUNNELING REGIME - CROSSOVER FROM APERIODIC TO REGULAR BEHAVIOR

Authors
MARCUS CM WESTERVELT RM HOPKINS PF GOSSARD AC
Citation
Cm. Marcus et al., CONDUCTANCE FLUCTUATIONS IN A QUANTUM-DOT IN THE TUNNELING REGIME - CROSSOVER FROM APERIODIC TO REGULAR BEHAVIOR, Surface science, 305(1-3), 1994, pp. 480-489
Citations number
29
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
305
Issue
1-3
Year of publication
1994
Pages
480 - 489
Database
ISI
SICI code
0039-6028(1994)305:1-3<480:CFIAQI>2.0.ZU;2-B
Abstract
We discuss magnetoconductance fluctuations in a approximately 1 mum Ga AS/AlxGa1-xAs quantum dot in the shape of a chaotic stadium billiard w ith point contact leads. Here we emphasize measurements carried out in the tunneling regime, where each lead carries less than one fully con ducting channel. We discuss various crossover phenomena as the magneto conductance fluctuations evolve from aperiodic structure at low fields (B less than or similar to 0.5 T) into periodic, Aharonov-Bohm-like o scillations at higher fields.