Authors

Citation

A. Endo et al., Envelope of commensurability magnetoresistance oscillation in unidirectional lateral superlattices, PHYS REV B, 62(24), 2000, pp. 16761-16767

Citations number

20

Language

INGLESE

art.tipo

Article

Categorie Soggetti

Apllied Physucs/Condensed Matter/Materiales Science

Journal title

PHYSICAL REVIEW B

ISSN journal

0163-1829
→ ACNP

Volume

62

Issue

24

Year of publication

2000

Pages

16761 - 16767

Database

ISI

SICI code

0163-1829(200012)62:24<16761:EOCMOI>2.0.ZU;2-2

Abstract

The envelope of the commensurability magnetoresistance oscillation (Weiss o
scillation) has been studied for lateral superlattices prepared from two-di
mensional electron gas (2DEG) wafers with varying mobility mu. and spacer-l
ayer thickness d(s). When the 2DEG has a high enough mu and a large enough
d(s), the envelope is well described by the formula given by Peeters and Va
silopoulos in a first-order perturbation theory [Phys. Rev. B 46, 4667 (199
2).]. For smaller mu or d(s), the oscillation diminishes faster than the fo
rmula at lower B. The damping can be accounted for by an additional factor
of the form [pi/(mu B-W)]/sinh[pi/(mu B-W)]. The parameter mu (W) is found
to be proportional to the mean free path L of the 2DEG, and the coefficient
of proportionality increases with d(s). The magnitude of mu (W), as well a
s its dependence on d(s) and the electron areal density n(s), is close to t
hat of mu (Q), the mobility corresponding to the total scattering time.