Stormer, H. L. ; Haavasoja, T. ; Narayanamurti, V. ; Gossard, A. C. ; Wiegmann, W. (1983) Observation of the deHaas-van Alphen effect in a two-dimensional electron system Journal of Vacuum Science and Technology B, 1 (2). pp. 423-426. ISSN 1071-1023
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Related URL: http://dx.doi.org/10.1116/1.582618
Abstract
We report the first observation of the oscillatory magnetic moment as a function of the magnetic field (deHaas-van Alphen effect) of a two-dimensional electron gas. The measurements were performed at 1.5 K on a modulation-doped GaAs-(AlGa)As heterostructure using a SQUID magnetometer. The strength of the signal was enhanced by stacking 4000 layers equivalent to an area of 240 cm2. The data are in qualitative agreement with theory but the amplitude of the oscillations is about a factor of 30 weaker than expected. We attribute this discrepancy to sample inhomogeneities. More accurate measurements should allow a direct determination of the electronic density of states.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to AVS (American Vacuum Society). |
| ID Code: | 87503 |
| Deposited On: | 19 Mar 2012 12:38 |
| Last Modified: | 19 Mar 2012 12:38 |
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