Versatile Tunability of the Metal Insulator Transition in (TiO 2 ) m /(VO 2 ) m Superlattices
Abstract
Abstract In contrast to perovskites that share only common corners of cation‐occupied octahedra, binary‐oxides in addition share edges and faces increasing the versatility for tuning the properties and functionality of reduced dimensionality systems of strongly correlated oxides. This approach for tuning the electronic structure is based on the ability of X‐ray spectroscopy methods to monitor the creation and transformation of occupied and unoccupied electronic states produced by interface coupling and lattice distortions. X‐ray diffraction reveals a new range of structural metastability in (TiO 2 ) m /(VO 2 ) m /TiO 2 (001) superlattices with m = 1, 3, 5, 20, 40, and electrical transport measurements show metal insulator transition (MIT) behavior typically associated with presence of high oxygen vacancy concentrations. However, X‐ray absorption spectroscopy (XAS) at the Ti and V L 3,2 ‐edge and resonant inelastic X‐ray scattering (RIXS) at the Ti and V L 3 ‐edge show no excitations characteristic of oxygen vacancy induced valance change in V and negligible intensities in Ti RIXS. The unexpected absence of oxygen vacancy related states in the X‐ray spectroscopy data suggests that superlattice fabrication is capable of suppressing oxygen vacancy formation while still affording a wide tunability range of the MIT.more »
- Authors:
-
- Oak Ridge National Laboratory Materials Science and Technology Division Oak Ridge TN 37831 USA
- Oak Ridge National Laboratory Materials Science and Technology Division Oak Ridge TN 37831 USA;Department of Emerging Materials Science Daegu‐Gyeongbuk Institute of Science and Technology Daegu 42988 Republic of Korea
- Department of Materials Science and Engineering University of Tennessee Knoxville TN 37996 USA
- Paul Scherrer Institut Photon Science Division Villigen PSI CH‐5232 Switzerland
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Swiss National Science Foundation (SNSF); European Commission (EC); USDOE
- OSTI Identifier:
- 1664492
- Alternate Identifier(s):
- OSTI ID: 1770648; OSTI ID: 1785853
- Grant/Contract Number:
- AC05-00OR22725; CRSII2_160765/1; CRSII2_141962; FP7/20072013; 290605; 200021_178867; 200021_182695
- Resource Type:
- Published Article
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Name: Advanced Functional Materials Journal Volume: 30 Journal Issue: 51; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Eres, Gyula, Lee, Shinbuhm, Nichols, John, Sohn, Changhee, Ok, Jong Mok, Mazza, Alessandro R., Liu, Chenze, Duscher, Gerd, Lee, Ho Nyung, McNally, Daniel E., Lu, Xingye, Radovic, Milan, and Schmitt, Thorsten. Versatile Tunability of the Metal Insulator Transition in (TiO 2 ) m /(VO 2 ) m Superlattices. Germany: N. p., 2020.
Web. doi:10.1002/adfm.202004914.
Eres, Gyula, Lee, Shinbuhm, Nichols, John, Sohn, Changhee, Ok, Jong Mok, Mazza, Alessandro R., Liu, Chenze, Duscher, Gerd, Lee, Ho Nyung, McNally, Daniel E., Lu, Xingye, Radovic, Milan, & Schmitt, Thorsten. Versatile Tunability of the Metal Insulator Transition in (TiO 2 ) m /(VO 2 ) m Superlattices. Germany. https://doi.org/10.1002/adfm.202004914
Eres, Gyula, Lee, Shinbuhm, Nichols, John, Sohn, Changhee, Ok, Jong Mok, Mazza, Alessandro R., Liu, Chenze, Duscher, Gerd, Lee, Ho Nyung, McNally, Daniel E., Lu, Xingye, Radovic, Milan, and Schmitt, Thorsten. Sun .
"Versatile Tunability of the Metal Insulator Transition in (TiO 2 ) m /(VO 2 ) m Superlattices". Germany. https://doi.org/10.1002/adfm.202004914.
@article{osti_1664492,
title = {Versatile Tunability of the Metal Insulator Transition in (TiO 2 ) m /(VO 2 ) m Superlattices},
author = {Eres, Gyula and Lee, Shinbuhm and Nichols, John and Sohn, Changhee and Ok, Jong Mok and Mazza, Alessandro R. and Liu, Chenze and Duscher, Gerd and Lee, Ho Nyung and McNally, Daniel E. and Lu, Xingye and Radovic, Milan and Schmitt, Thorsten},
abstractNote = {Abstract In contrast to perovskites that share only common corners of cation‐occupied octahedra, binary‐oxides in addition share edges and faces increasing the versatility for tuning the properties and functionality of reduced dimensionality systems of strongly correlated oxides. This approach for tuning the electronic structure is based on the ability of X‐ray spectroscopy methods to monitor the creation and transformation of occupied and unoccupied electronic states produced by interface coupling and lattice distortions. X‐ray diffraction reveals a new range of structural metastability in (TiO 2 ) m /(VO 2 ) m /TiO 2 (001) superlattices with m = 1, 3, 5, 20, 40, and electrical transport measurements show metal insulator transition (MIT) behavior typically associated with presence of high oxygen vacancy concentrations. However, X‐ray absorption spectroscopy (XAS) at the Ti and V L 3,2 ‐edge and resonant inelastic X‐ray scattering (RIXS) at the Ti and V L 3 ‐edge show no excitations characteristic of oxygen vacancy induced valance change in V and negligible intensities in Ti RIXS. The unexpected absence of oxygen vacancy related states in the X‐ray spectroscopy data suggests that superlattice fabrication is capable of suppressing oxygen vacancy formation while still affording a wide tunability range of the MIT. Achieving a wide range of MIT tunability while reducing or eliminating oxygen vacancies that are detrimental to electrical properties is highly desirable for technological applications of strongly correlated oxides.},
doi = {10.1002/adfm.202004914},
journal = {Advanced Functional Materials},
number = 51,
volume = 30,
place = {Germany},
year = {Sun Sep 20 00:00:00 EDT 2020},
month = {Sun Sep 20 00:00:00 EDT 2020}
}
https://doi.org/10.1002/adfm.202004914
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