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- W1967702932 abstract "Large changes in the electrical resistance induced by the application of a small magnetic field are potentially useful for device-applications. Such Giant Magneto-Resistance (GMR) effects also provide new insights into the physical phenomena involved in the associated electronic transport. This study examines a “bell-shape” negative GMR that grows in magnitude with decreasing temperatures in mm-wide devices fabricated from the high-mobility GaAs/AlGaAs 2-Dimensional Electron System (2DES). Experiments show that the span of this magnetoresistance on the magnetic-field-axis increases with decreasing device width, W, while there is no concurrent Hall resistance, Rxy, correction. A multi-conduction model, including negative diagonal-conductivity and non-vanishing off-diagonal conductivity, reproduces experimental observations. The results suggest that a size effect in the mm-wide 2DES with mm-scale electron mean-free-paths is responsible for the observed “non-ohmic” size-dependent negative GMR." @default.
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- W1967702932 date "2013-09-25" @default.
- W1967702932 modified "2023-09-29" @default.
- W1967702932 title "Size-dependent giant-magnetoresistance in millimeter scale GaAs/AlGaAs 2D electron devices" @default.
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- W1967702932 doi "https://doi.org/10.1038/srep02747" @default.
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