Broadband Impedance Microscopy for Research on Complex Quantum Materials
Abstract
The DURIP program "Broadband Impedance Microscopy for Research on Complex Quantum Materials" supported by ARO has been successfully completed by the PI's group. By customizing the equipment purchased through this award, we have demonstrated the broadband impedance imaging with a spatial resolution better than 100 nm and a capacitance sensitivity better than 10 aF over 7 orders of magnitude in frequency (from 1 kHz to 10 GHz), as specified in the initially proposed program. In particular, exciting results were obtained to locally resolve the collective vibration of ferroelectric domain walls, which manifests itself as a frequency-dependent dielectric loss in the MHz- GHz regime. With the combined capability of dielectric spectroscopy and impedance microscopy, we expect to gain tremendous knowledge on complex quantum materials for their applications in the next-generation acoustic, electronic, and optic devices, all of which crucial for Defense purposes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 08, 2016
- Accession Number
- AD1008605
Entities
People
- Keji Lai
Organizations
- University of Texas at Austin