Published September 1998
| Version v1
Journal article
Layered Ruthenium Oxides: From Band Metal to Mott Insulator
- 1. Department of Applied Physics, Stanford University, Stanford, California 94305-4045 (United States)
- 2. Department of Physics, University of California at San Diego, La Jolla, California 92093-0319 (United States)
- 3. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S4M1 (CANADA)
- 4. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310 (United States)
Description
We present results of the first optical and angle-resolved photoemission study on a layered ruthenium oxide system with various Ca/Sr substitution levels. Using two-plane (Sr1-x Cax )3Ru2O7 and one-plane Ca2RuO 4 crystals we were able to study evolution of the electronic properties in a range from a band metal (Sr3 Ru2O 7) to a 'bad' metal (Ca3 Ru2O 7) to a Mott-Hubbard insulator (Ca2 RuO4) . Apart from a Mott-Hubbard metal-insulator transition (MIT), we have uncovered a qualitative change of the electronic properties at a critical x=0.33 . We suggest that the latter is a result of a quantum phase transition into an antiferromagnetic phase that precedes the real Mott-Hubbard MIT. copyright 1998 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 81
- Journal Issue
- 13
- Journal Page Range
- p. 2747-2750
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 30006370
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CALCIUM ADDITIONS; ELECTRONIC STRUCTURE; FERMI LEVEL; HUBBARD MODEL; PEROVSKITES; PHOTOEMISSION; REFLECTIVITY; RUTHENIUM OXIDES; STRONTIUM ADDITIONS
- Descriptors DEC
- CHALCOGENIDES; CRYSTAL MODELS; EMISSION; ENERGY LEVELS; MATHEMATICAL MODELS; MINERALS; OPTICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RUTHENIUM COMPOUNDS; SECONDARY EMISSION; SURFACE PROPERTIES; TRANSITION ELEMENT COMPOUNDS