Cyclotron resonance to 100 mK of a GaAs heterojunction in the ultra-quantum limit

A helium dilution refrigerator has been modified to enable cyclotron resonance measurements to 100 mK on low-density, 2D electron systems in the ultra-quantum limit. Previous cyclotron resonance work to 300 mK indicates the presence of a phase boundary at a filling factor of v c ≃1/10, separating gas-like behavior at v

Keywords:

• Heterojunction
• Ground state
• Spin-½
• Cyclotron resonance
• Filling factor
• Helium dilution technique
• Nuclear magnetic resonance
• Electron
• Quantum limit
• Chemistry

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