Abstract
Graphene layers placed on SrTiO3 single-crystal substrates, i.e., templates for remote epitaxy of functional oxide membranes, were investigated using temperature-dependent confocal Raman spectroscopy. This approach successfully resolved distinct Raman modes of graphene that are often untraceable in conventional measurements with non-confocal optics due to the strong Raman scattering background of SrTiO3. Information on defects and strain states was obtained for a few graphene/SrTiO3 samples that were synthesized by different techniques. This confocal Raman spectroscopic approach can shed light on the investigation of not only this graphene/SrTiO3 system but also various two-dimensional layered materials whose Raman modes interfere with their substrates.
| Original language | English |
|---|---|
| Article number | 105301 |
| Journal | Journal of Applied Physics |
| Volume | 133 |
| Issue number | 10 |
| DOIs | |
| State | Published - Mar 14 2023 |
Bibliographical note
Funding Information:We thank Chengye Dong, Joshua Robinson, Ji-Yun Moon, Jae-Hyun Lee, and Bernhard Keimer for providing samples, experimental help, and valuable discussions and advice. The work at the University of Kentucky was supported by the National Science Foundation (Grant No. DMR-2104296). The team at MIT acknowledges support from the Air Force Research Laboratory (Award No. FA9550-19-S-0003). N.L.K. was partially supported by the Southern Company. A.S. thanks Hian for the careful correction of this manuscript.
Publisher Copyright:
© 2023 Author(s).
ASJC Scopus subject areas
- Physics and Astronomy (all)