2k{sub F}-selected conductance oscillations of high-mobility two-dimensional electron gas in Corbino devices
- International Center for Quantum Materials, School of Physics, Peking University, 100871, Beijing (China)
- Collaborative Innovation Center of Quantum Matter, 100871, Beijing (China)
- Rice University, Houston, Texas 77251-1892 (United States)
- Princeton University, Princeton, New Jersey 08544 (United States)
We have observed electrical-field induced magneto-conductivity oscillations measured in Corbino samples made of a GaAs high-mobility two-dimensional electron gas, and found a consistent interpretation based on a semiclassical model of 2k{sub F}-selected orbital transitions between N and N + 1, 2, 3,…, Landau levels at respective local potentials, where k{sub F} is the Fermi wavevector. From the oscillation period, we deduce an effective mass value, which is consistent with the bare electron band mass of GaAs. In the same devices but with a vanishing electrical field and at elevated temperatures, we observed additional oscillation features, which can be attributed to cyclotron resonance by population of acoustic phonons. We thus demonstrate a method to determine the carrier effective mass and the sound velocity of host crystals by standard electrical transport.
- OSTI ID:
- 22391907
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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