Abstract
The nonlinear interaction of a direct current (DC) flowing in a thin metal film with an external low-frequency alternating-current (AC) electromagnetic field is studied theoretically. The nonlinearity is related to the influence of the magnetic field of the DC and the magnetic field of the wave on the form of the electron trajectories. This magnetodynamic mechanism of nonlinearity is typical for pure metals at low temperatures. We find that such an interaction causes sharp kinks in the temporal dependence of the AC electric field of the wave on the surface of a sample. The phenomenon of amplification of the electromagnetic signal on the metal surface is predicted. We also calculate the nonlinear surface impedance and show that it decreases drastically with the increase of the wave amplitude.
| Original language | English |
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| Pages (from-to) | 4613-4627 |
| Number of pages | 15 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 12 |
| Issue number | 21 |
| DOIs | |
| State | Published - 29 May 2000 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics