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High-resolution x-ray diffraction rocking curve of an heterostructure. The satellite peaks indicate the high quality of the heterostructure.
Magnetoresistance of the 2DEG in an heterostructure as a function of magnetic field normal to the heterointerface at . The inset shows the beating patterns observed at the magnetic fields between 3 and .
The second derivative of the of the 2DEG in an heterostructure as a function of at .
The FFT spectra of the Shubnikov–de Haas oscillations shown in Fig. 3.
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