Searching for Exotic Bulk and Interfacial Quantum Phenomena of Perovskite Ruthenates
Abstract
This objective of this project is to seek novel quantum phenomena in perovskite ruthenates, study their underlying physics, and explore their possible application. We have studied metal-insulator transitions in doped Ca2RuO4 and Ca3Ru2O7. We find that the metal-insulator (MI) transitions in both materials can be effectively controlled by Ti and Fe doping. In Ca2RuO4 we have tuned the MI transition to a transition close to a 2nd-order transition with Tc ~ 250-320K and TCRmax~ 0.5 K-1 (TCR: temperature coefficient of resistance) . Such a MI transition is likely useful for developing a new generation of bolometric detection technology. In addition, we have investigated electronic and magnetic properties of (Sr1-xCax)3Ru2O7. We find that this system exhibits complex electronic and magnetic ground states and that magnetic states are strongly coupled with electronic states. This demonstrates the strong interplay between the charge and spin degrees of freedom in ruthenates. This finding advances our understanding of strongly correlated phenomena in oxides.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2010
- Accession Number
- ADA534042
Entities
People
- Zhiqiang Mao
Organizations
- Tulane University of Louisiana