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Quantum Transport in Non-Equilibrium Two-Dimensional Electron Systems

Quantum Transport in Non-Equilibrium Two-Dimensional Electron Systems Rui-Rui Du, William Marsh Rice University, DMR 0706634. Our laboratory studies electronic transport

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Quantum Transport in Non-Equilibrium Two-Dimensional Electron Systems

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  1. Quantum Transport in Non-Equilibrium Two-Dimensional Electron Systems Rui-Rui Du, William Marsh Rice University, DMR 0706634 Our laboratory studies electronic transport in a 2D electron system that is driven by a large electrical current or excited by microwaves. Such a non-equilibrium electronic system can exhibit fascinating nonlinear phenomena. For example, the electrical resistance in such systems can reach zero. Spins of electrons can be aligned by applying an electrical current instead of a magnetic field. We also study transport in nano-patterned 2DES where triangular or honeycomb 2D crystal structure plays important roles in electronic transport. Recently, we have studied nonlinear transport in the 2D hole system in carbon-doped (001) GaAS/AlGaAs quantum wells, and found surprising results originated from the spin-orbital coupling effect in this new material. Appl. Phys. Lett. 94, 052103 (2009) Phys. Rev. B80, 041310 (2009) Temperature 300 mK – 10 K Electronic transport in planar semiconductor device patterned with a triangular lattice

  2. Quantum Transport in Non-Equilibrium Two-Dimensional Electron Systems Rui-Rui Du, William Marsh Rice University, DMR 0706634 Science Understanding of fundamental properties of a 2DEG driven by high frequency electromagnetic waves is directly relevant to emerging issues in spintronics and quantum information processing. Improvement of materials quality, invention of new materials and structures, and characterization of structures are part of the collaborative efforts required by this research, but would also directly or indirectly impact the development of novel optoelectronic devices. • Education • Education of graduate students familiar with semiconductor physics, microwave technology, and imaging technique serves well for the research infra-structure and high-technology industry. • This grant supported two graduate students, Kristjan Stone, and Yuanhua Dai for their Ph. D thesis work. Partial support for MS student Ivan Knez. • Our Laboratory participated in student science tour, graduate recruiting, and Rice Quantum Institute interdisciplinary activities. Durst and Girvin, Science 05

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