Electronic transport of titanate heterostructures and their potential as channels on (001) Si
Abstract
Perovskite oxides and their heterostructures have demonstrated considerable potential for devices that require high carrier densities. These oxides are typically grown on ceramic substrates that suffer from low thermal conductivity, which limits performance under high currents, and from the limited size of substrates, which precludes large scale integration and processing. We address both of these hurdles by integrating oxide heterostructures with high carrier density 2D electron gases (2DEGs) directly on (001) Si. 2DEGs grown on Si show significant improvement of the high current performance over those grown on oxide substrates, a consequence of the higher thermal conductivity of the substrate. Hall analysis, transmission line measurements, and the conductance technique are employed for a detailed analysis of the carrier density, contact resistance, mobility, and electron drift velocities. Current densities of 10 A/cm are observed at room temperature with 2.9 × 1014 electrons/cm2 at a drift velocity exceeding 3.5 × 105 cm/s. These results highlight the promise of oxide 2DEGs integration on Si as channels for high electron density devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 09, 2015
- Source ID
- 10.1063/1.4930140
Entities
People
- Charles Ahn
- Eric N Jin
- Fred J. Walker
- Lior Kornblum
- Mohamed Boucherit
- Omor Shoron
- Siddharth Rajan
Organizations
- National Science Foundation
- Office of Naval Research
- Ohio State University
- Yale University