Quantum oscillations from a two-dimensional electron gas at a Mott/band insulator interface
Abstract
We report on the magnetotransport properties of a prototype Mott insulator/band insulator perovskite heterojunction in magnetic fields up to 31 T and at temperatures between 360 mK and 10 K. Shubnikov-de Haas oscillations in the magnetoresistance are observed. The oscillations are two-dimensional in nature and are interpreted as arising from either a single, spin-split subband or two subbands. In either case, the electron system that gives rise to the oscillations represents only a fraction of the electrons in the space charge layer at the interface. The temperature dependence of the oscillations is used to extract an effective mass of ∼1 me for the subband(s). The results are discussed in the context of the t2g-states that form the bottom of the conduction band of SrTiO3.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 08, 2012
- Source ID
- 10.1063/1.4758989
Entities
People
- Daniel G. Ouellette
- David Goldhaber-Gordon
- James R. Williams
- Leon Balents
- Pouya Moetakef
- S. J. Allen
- Susanne Stemmer
Organizations
- Army Research Office
- National Science Foundation
- Stanford University
- University of California, Santa Barbara