Quantum Transport Lab
Dept. of Physics & Astronomy, Rice University

Principal Investgator

RuiRui Du


Rice University

Physics & Astronomy Dept

Dell Butcher Hall 170

1900 Rice Blvd Ent.20

Houston TX 77005

Office: 713-348-5780

Lab: 713-348-5719





Join our group

by sending your Curriculum vitae
to rrd@rice.edu



Research in the Quantum Transport Lab is centered on the experimental investigations on the physics of low dimensional electron systems, in particular on the fractional quantum Hall effect, and on quantum transport of nonequilibrium electronic systems. The research work focuses on fundamental understanding of quantum mechanical properties of electrons in low dimensional and nanoscale semiconductor structures and devices. Here is an outline of current research topics. 2D and 1D electron systems provide both a clean laboratory for many-particle physics and a unique platform addressing emerging issues in spintronics and solid-state quantum information devices. Our recent research has been centered on these two themes and has been supported by DOE, NSF, and DARPA. The materials used are mainly GaAs/AlGaAs heterostructures and quantum wells, but also include Si and GaN depending on the physics involved.

For more information regarding this group please send all inquiries to Dr. Du at rrd@rice.edu.


Quantum Spin Hall Effect


In the topologically non-trivial regime, electron-hole subbands cross for some wave-vector values kcross and due to the tunneling between the wells, electron and hole states hybridize, lifting the degeneracy at kcross and opening an inverted energy gap

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Exciton condensation


Experimentally, e-h bilayers can be realized in InAs/GaSb system with a suitable tunneling barrier between the two layers. Our goal is to explore the condensed phase of excitons in this novel material without optical pumping or magnetic fields.

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Microwave spectroscopy


Microwave absorption spectroscopy has been proposed as a unique tool in studies of edge physics of quantum Hall droplets. In our ongoing experiment we pattern co-planar waveguide (CPW) and micrometer-size discs on the same chip of a high-mobility GaAs/AlGaAs two-dimensional electron gas.

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