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Transport Mechanisms of Electrically Detected Electron Spin Resonance in Two-Dimensional Electron System in GaAs Quantum Wells


Shu-chen Liu

Electrically detected electron spin resonance (EDESR) signals as a function of temperature in the range of T=0.4 – 4.3 K in an AlGaAs/GaAs multiple-quantum-well sample at the filling factor n=1 at magnetic field of B=5.7 T exhibits a maximum at about T=2 K and  vanishes gradually with increasing or decreasing temperatures [1]. A heating model suggests the transport mechanism of the microwave absorption through either the independent, non-interacting electrons or spin wave system for the two dimensional electron system (2DES) confined within 30 nm scale in GaAs/AlGaAs quantum wells. The activation energy gap DE for the Zeeman splitting spin gap is also discussed.

We also compare other physics systems with the temperature dependence of electrically detected ESR of a two dimensional electron system in GaAs/AlGaAs quantum wells for the study  of the transport properties of the electrons confined within 30 nm scale and find the analogy and connection. New conclusions could be expected to be discovered.

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