Engineered unique elastic modes at a BaTiO3/2x1-Ge(001) interface
Abstract
In this study, the strong interaction at an interface between a substrate and thin film leads to epitaxy and provides a means of inducing structural changes in the epitaxial film. These induced material phases often exhibit technologically relevant electronic, magnetic, and functional properties. The 2 x 1 surface of a Ge(001) substrate applies a unique type of epitaxial constraint on thin films of the perovskite oxide BaTiO3 where a change in bonding and symmetry at the interface leads to a non-bulk-like crystal structure of the BaTiO3. While the complex crystal structure is predicted using first-principles theory, it is further shown that the details of the structure are a consequence of hidden phases found in the bulk elastic response of the BaTiO3 induced by the symmetry of forces exerted by the germanium substrate.
- Authors:
-
- Yale Univ., New Haven, CT (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1246789
- Alternate Identifier(s):
- OSTI ID: 1240486; OSTI ID: 1334459
- Report Number(s):
- BNL-111940-2016-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: 16060; KC0403020
- Grant/Contract Number:
- SC00112704; AC02-06CH11357; AC02-98CH10886; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 10; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 29 ENERGY PLANNING, POLICY, AND ECONOMY; Center for Functional Nanomaterials; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kumah, D. P., Dogan, M., Ngai, J. H., Qiu, D., Zhang, Z., Su, D., Specht, E. D., Ismail-Beigi, S., Ahn, C. H., and Walker, F. J. Engineered unique elastic modes at a BaTiO3/2x1-Ge(001) interface. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.116.106101.
Kumah, D. P., Dogan, M., Ngai, J. H., Qiu, D., Zhang, Z., Su, D., Specht, E. D., Ismail-Beigi, S., Ahn, C. H., & Walker, F. J. Engineered unique elastic modes at a BaTiO3/2x1-Ge(001) interface. United States. https://doi.org/10.1103/PhysRevLett.116.106101
Kumah, D. P., Dogan, M., Ngai, J. H., Qiu, D., Zhang, Z., Su, D., Specht, E. D., Ismail-Beigi, S., Ahn, C. H., and Walker, F. J. Mon .
"Engineered unique elastic modes at a BaTiO3/2x1-Ge(001) interface". United States. https://doi.org/10.1103/PhysRevLett.116.106101. https://www.osti.gov/servlets/purl/1246789.
@article{osti_1246789,
title = {Engineered unique elastic modes at a BaTiO3/2x1-Ge(001) interface},
author = {Kumah, D. P. and Dogan, M. and Ngai, J. H. and Qiu, D. and Zhang, Z. and Su, D. and Specht, E. D. and Ismail-Beigi, S. and Ahn, C. H. and Walker, F. J.},
abstractNote = {In this study, the strong interaction at an interface between a substrate and thin film leads to epitaxy and provides a means of inducing structural changes in the epitaxial film. These induced material phases often exhibit technologically relevant electronic, magnetic, and functional properties. The 2 x 1 surface of a Ge(001) substrate applies a unique type of epitaxial constraint on thin films of the perovskite oxide BaTiO3 where a change in bonding and symmetry at the interface leads to a non-bulk-like crystal structure of the BaTiO3. While the complex crystal structure is predicted using first-principles theory, it is further shown that the details of the structure are a consequence of hidden phases found in the bulk elastic response of the BaTiO3 induced by the symmetry of forces exerted by the germanium substrate.},
doi = {10.1103/PhysRevLett.116.106101},
journal = {Physical Review Letters},
number = 10,
volume = 116,
place = {United States},
year = {Mon Mar 07 00:00:00 EST 2016},
month = {Mon Mar 07 00:00:00 EST 2016}
}
Web of Science
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