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Nanoscale Electrical Imaging of Novel Quantum Materials
February 20, 20154:00 pm – 5:00 pm (CDT)

Nanoscale Electrical Imaging of Novel Quantum Materials


Keji Lai (University of Texas. Austin)


Ar. Abanov



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

The research of complex quantum materials, in which a dazzling number of emergent phenomena take place in the nanoscale, is a major theme in modern condensed matter physics. For real-space imaging of complex systems, electrical impedance microscopy fills an important void that is not well represented by the existing local probes. Using shielded cantilever probes and sensitive microwave electronics, we can now perform non-invasive electrical imaging with sub-100nm resolution and sub-aF sensitivity. In this talk, I will focus on the visualization of metal-insulator transition of functional materials in field-effect-transistor configurations, which is enabled by the sub-surface imaging capability of impedance microscopy. Local probing on the anomalous conduction in multiferroic domain walls will also be discussed.

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