Magnetoconductance fluctuations in ballistic silver point-contacts
β Scribed by P.A.M. Holweg; J.A. Kokkedee; J. Caro; A.H. Verbruggen; S. Radelaar; A.G.M. Jansen; P. Wyder
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 328 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0749-6036
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π SIMILAR VOLUMES
In high ohmic pressure-type metallic point contacts (resistance range 50 Q to 3 kQ) the point-contact resistance is observed to switch randomly between two or more discrete levels. This effect can be explained by the motion or reorientation of single defects, thereby changing their cross section for
We present studies of the role of charge fluctuations in transport through a quantum point contact (QPC). Our model of QPC is based on assumption of a specific electronic energy structure with a resonant level below the electronic sub-band. We show that charge fluctuations lead to a dynamical Coulom
The low-frequency resistance noise of quantum point contacts is shown to be dominated by fluctuations in the electrostatic potential. Both in the ballistic and in the quantum Hall regime, the noise is strongly suppressed if the conductance is quantized. The suppression is enhanced by a strong magnet