Single dot and strongly coupled double dots at high magnetic fields

✍ Scribed by D.G Austing; H Tamura; Y Tokura; K Muraki; S Amaha; K Ono; S Tarucha

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 321 KB
• Volume: 10
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(01)00064-9

✦ Synopsis

Circular vertical semiconductor single quantum dot artiÿcial atoms and strongly coupled double quantum dot artiÿcial molecules are investigated at high magnetic (B-) ÿelds up to 10 T. The phase diagrams showing the evolution with B-ÿeld of the conductance peaks re ecting the electro-chemical potential of the N -electron ground states for N from zero to about 20 are compared, and the origin of the di erences is discussed. In particular, the stability of the spin-polarized maximum density droplet (MDD) at ÿlling factor, = 1, is much reduced in the double dot system compared to the single dot system.