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Polarization junction platforms have high-density 2D hole gas (2DHG) and 2D electron gas (2DEG) respectively induced by negative and positive polarization charges in undoped GaN/AlGaN/GaN double heterostructures. Sheet resistance measurements in a wide temperature range (6–460 K) revealed that 2DHG and 2DEG resistances were monotonically enhanced with the temperature reduction. On the platform, monolithic...
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