General analysis of instabilities and oscillations of the sequential tunneling in superlattices

Authors
Wang, XR Niu, Q
Citation
Xr. Wang et Q. Niu, General analysis of instabilities and oscillations of the sequential tunneling in superlattices, PHYS REV B, 59(20), 1999, pp. R12755-R12758
Citations number
35
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
20
Year of publication
1999
Pages
R12755 - R12758
Database
ISI
SICI code
0163-1829(19990515)59:20<R12755:GAOIAO>2.0.ZU;2-L
Abstract
We present a general analysis of instabilities and oscillations of the sequ ential tunneling current in superlattices, based on the current-voltage cha racteristic of a single barrier. Our results depend only on the presence of a negative differential resistance region and are independent of the detai ls of the model. We establish general conditions for the existence of a sta ble oscillatory region of current-voltage characteristic of the superlattic e, and for instability leading to current self-oscillation. Our formalism p ermits a natural connection to standard results of chaos theory. [S0163-182 9(99)50520-1].