Microwave-induced zero-resistance states are not necessarily static
| Autor: | Ilya Finkler, Bertrand I. Halperin |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Physics
Magnetoresistance Condensed matter physics Charge density Non-equilibrium thermodynamics Charge (physics) 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field Continuity equation 0103 physical sciences Phenomenological model 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 79 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.79.085315 |
| Popis: | We study the effect of inhomogeneities in Hall conductivity on the nature of the zero resistance states seen in the microwave irradiated two-dimensional electron systems in weak perpendicular magnetic fields and show that time-dependent domain patterns may emerge in some situations. For an annular Corbino geometry, with an equilibrium charge density that varies linearly with radius, we find a time-periodic nonequilibrium solution, which might be detected by a charge sensor, such as a single electron transistor. For a model on a torus, in addition to static domain patterns seen at high and low values of the equilibrium charge inhomogeneity, we find that, in the intermediate regime, a variety of nonstationary states can also exist. We catalog the possibilities we have seen in our simulations. Within a particular phenomenological model, we show that linearizing the nonlinear charge continuity equation about a particularly simple domain-wall configuration and analyzing the eigenmodes allows us to estimate the periods of the solutions to the full nonlinear equation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|