Large nanoscale electronic conductivity in complex oxide heterostructures with ultra high electron density
Abstract
We study the two-dimensional electron gas at the interface of NdTiO3 and SrTiO3 to reveal its nanoscale transport properties. At electron densities approaching 1015 cm−2, our terahertz spectroscopy data show conductivity levels that are up to six times larger than those extracted from DC electrical measurements. Moreover, the largest conductivity enhancements are observed in samples intentionally grown with larger defect densities. This is a signature of electron transport over the characteristic length-scales typically probed by electrical measurements being significantly affected by scattering by structural defects introduced during growth, and, a trait of a much larger electron mobility at the nanoscale.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 01, 2016
- Source ID
- 10.1063/1.4959284
Entities
People
- Ajay Nahata
- Ashish Chanana
- Berardi Sensale-Rodriguez
- Bharat Jalan
- Hugo O. Condori Quispe
- Peng Xu
- Sara Arezoomandan
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- University of Minnesota
- University of Utah