|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
AC-Hopping Conductance of Self-Organized Ge/Si Quantum Dot Arrays | | Irina L. Drichko
; Andrey M. Diakonov
; Veniamin I. Kozub
; Ivan Yu. Smirnov
; Yuri M. Galperin
; Andrew I. Yakimov
; Alexander I. Nikiforov
; | | Date: |
12 Nov 2003 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | Dense ($n=4 imes 10^{11}$ cm$^{-2}$) arrays of Ge quantum dots in Si host were studied using attenuation of surface acoustic waves (SAWs) propagating along the surface of a piezoelectric crystal located near the sample. The SAW magneto-attenuation coefficient, $DeltaGamma=Gamma(omega, H)-Gamma(omega, 0)$, and change of velocity of SAW, $Delta V /V=(V(H)-V(0)) / V(0)$, were measured in the temperature interval $T$ = 1.5-4.2 K as a function of magnetic field $H$ up to 6 T for the waves in the frequency range $f$ = 30-300 MHz. Basing on the dependences of $DeltaGamma$ on $H$, $T$ and $omega$, as well as on its sign, we believe that the AC conduction mechanism is a combination of diffusion at the mobility edge with hopping between localized states at the Fermi level. The measured magnetic field dependence of the SAW attenuation is discussed basing on existing theoretical concepts. | | Source: | arXiv, cond-mat/0311267 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER