The double perovskite CaMnTi2O6, is a rare A site ordered perovskite oxide that exhibits a sizable ferroelectric polarization and relatively high Curie temperature. Using first-principles calculations combined with detailed symmetry analyses, we identify the origin of the ferroelectricity in CaMnTi2O6. We further explore the material properties of CaMnTi2O6, including its ferroelectric polarization, dielectric and piezoelectric responses, magnetic order, electronic structure, and optical absorption coefficient. It is found that CaMnTi2O6 exhibits room-temperature-stable ferroelectricity and moderate piezoelectric responses. Moreover, CaMnTi2O6 is predicted to have a semiconducting energy band gap similar to that of BiFeO3, and its band gap can further be tuned-via distortions of the planar Mn-O bond lengths. CaMnTi2O6 exemplifies a new class of single-phase semiconducting ferroelectric perovskites for potential applications in ferroelectric photovoltaic solar cells.
A-Site Ordered Double Perovskite CaMnTi2O6 as a Multifunctional Piezoelectric and Ferroelectric-Photovoltaic Material
Creators
Gaoyang Gou - Xi'an Jiaotong University
Nenian Charles - Drexel University
Jing Sho - Xi'an Jiaotong University
James M. Rondinelli - Northwestern University
Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Details
Inorganic chemistry, v 56(19), pp 11854-11861
Publisher
American Chemical Society; Washington, DC
Number of pages
8
Grant note
11574244 / National Science Foundation of China; National Natural Science Foundation of China (NSFC)
DMR-1420620 / National Science Foundation (NSF)
National Supercomputer Center (NSCC) in Tianjin
ACI-1548562 / NSF; National Science Foundation (NSF)
DE-AC02-06CH11357 / U.S. DOE, Office of Basic Energy Sciences; United States Department of Energy (DOE)
Resource Type
Journal article
Language
English
Academic Unit
Materials Science and Engineering
Web of Science ID
WOS:000412379000044
Scopus ID
2-s2.0-85030534383
Other Identifier
991019330793504721
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