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Title: 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:
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [1];  [1];  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. 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}
}

Journal Article:

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Cited by: 14 works
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