Temperature dependence of the resistance resonance in weakly coupled quantum wells

✍ Scribed by S Charlebois; J Beerens; R Côté; E Lavallée; J Beauvais; Z.R Wasilewski

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 125 KB
• Volume: 6
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(99)00140-x

✦ Synopsis

We report on measurements of the resistance of a double quantum well structure (DQW) with weakly coupled wells (tunneling gap = 0:29 meV) as a function of temperature and in-plane magnetic ÿeld. Our data clearly show the expected enhancement of the resistance when the DQW is placed in its balanced conditions (using an electrostatic gating technique). Although most features of this "resistance resonance" (RR) can be explained in the framework of a theory put forward by Berk et al. [Phys. Rev. B 50 (1994) 15 420], the amplitude of the RR observed in our sample cannot be quantitatively explained by this theory. We attribute this discrepancy to the weak tunneling conditions in our case, which lead to a situation where the inter-well transfer time is larger (by a factor of 2) than the electron scattering time.