Abstract
We studied the single-layered iridate Sr2IrO4 with a scanning tunneling microscope. The finite low temperature conductance enables the electronic structure of this antiferromagnetic Mott insulator to be measured by tunneling spectroscopy. We imaged the topography of freshly cleaved surfaces and measured differential tunneling conductance at cryogenic temperatures. We found the Mott gap in the tunneling density of states to be 2Δ=615 meV. Within the Mott gap, additional shoulders are observed which are interpreted as inelastic loss features due to magnons.
Document Type
Article
Publication Date
2-24-2014
Digital Object Identifier (DOI)
http://dx.doi.org/10.1103/PhysRevB.89.085125
Repository Citation
Nichols, John A.; Bray-Ali, Noah; Ansary, Armin; Cao, Gang; and Ng, Kwok-Wai, "Tunneling into the Mott Insulator Sr2IrO4" (2014). Center for Advanced Materials Faculty Publications. 1.
https://uknowledge.uky.edu/cam_facpub/1
Notes/Citation Information
Published in Physical Review B: Condensed Matter and Materials Physics, v. 89, article 085125, p. 1-4.
©2014 American Physical Society
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