Transverse Magnetoresistive Effects in a Quasi-One-Dimensional Electron System Over Superfluid Helium |
| |
Authors: | V A Nikolaenko Yu Z Kovdrya S P Gladchenko |
| |
Affiliation: | (1) B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 61103 Kharkov, Ukraine |
| |
Abstract: | No Heading The transverse magnetoresistive effects in a nondegenerate quasi-one-dimensional (Q1D) electron system over superfluid helium have been investigated experimentally. The longitudinal magnetoresistance xx have been measured in magnetic fields B up to 2.5 T in the temperature range 0.48 – 2 K. The width of conducting channels was 90 nm and 35 m, the mean electron density varied from 109 m–2 to 1.5 × 1012 m–2. It has been shown that the value of xx practically does not depend on B at low B and xx B in the quantum regime. The effective mobility of electrons in narrow channels increases under decreasing temperature and is determined by electron scattering by gas atoms, ripplons, and non-uniformities of the substrate. The mobility of electrons in wide channels increases with decreasing temperature and, below some temperature Tm, decreases. The negative magnetoresistance has been observed in the gas- and ripplon-scattering region. This effect has been explained by weak localization of carriers caused by the interaction of electrons with gas atoms in vapor at high temperatures and with ripplons or with non-uniformities of the substrate at low temperatures.PACS numbers: 73.20.Dx; 73.90.+ |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|