| Title | Modulation of Electrical and Thermal Transports through Lattice Distortion in BaTi1–xNbxO3 Solid Solutions |
| Author | |
| Corresponding Author | Yuqiao Zhang; Weishu Liu; Hiromichi Ohta |
| Publication Years | 2022-07
|
| DOI | |
| Source Title | |
| Abstract | The electron and heat transports in solids are through the movement of carrier electrons
and quantized lattice vibrations (phonons), which are sensitive to the lattice distortion and
ionized impurities, and are essential aspects for the development of novel thermoelectric
materials. In this study, we systematically investigated the modulations of electrical and
thermal conductivities of BaTi1–xNbxO3 solid solution (BTNO, 0 x 1) epitaxial fifilms.
At room temperature, BaTiO3 belongs to tetragonal perovskite and exhibits electron
conduction through doubly degenerated Ti 3d-t2g orbitals upon doping, while BaNbO3
belongs to cubic perovskite and exhibits metallic electron conduction through partially
fifilled triply degenerate Nb 4d-t2g orbitals. By controlling the Ti/Nb ratio, we found a dual
modulation effect on both the lattice structures and conduction band, which affects the
electrical and thermal conductivities. Similar to the SrTi1–xNbxO3 solid solution (STNO,
0 x 1) system, a phase transition was detected at x ∼ 0.5, at which both the electron
and heat transports exhibit abrupt changes. Unlike the transition in STNO, which was
attributed to a polaronic phase transition, the transition in BTNO was due to contributions
from both the lattice distortion and polaron effect. By controlling the lattice distortion,
conduction band, and polaronic phase transitions, the electrical and thermal conductivity
of BTNO epitaxial fifilms are modulated within a much greater range than those of the
STNO epitaxial fifilms. Due to the double contribution of electron carriers and phonon to
thermal conductivity (κ), the maximum κ modulation ratio of BTNO epitaxial fifilms was
∼6.9. Our research provides an effective route to design electrical/thermal management
materials. |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Corresponding
|
| WOS Accession No | WOS:000824063300001
|
| Data Source | 人工提交
|
| Citation statistics |
Cited Times [WOS]:1
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/415805 |
| Department | Department of Materials Science and Engineering |
| Affiliation | 1.Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People’s Republic of China 2.Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan 3.Foshan (Southern China) Institute for New Materials, Foshan 528200, People’s Republic of China 4.Department of Materials Science and Engineering, Southern University and Science and Technology, Shenzhen 518055, People’s Republic of China 5.Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, People’s Republic of China |
| Recommended Citation GB/T 7714 |
Yuqiao Zhang,Hai Jun Cho,Feng Jiang,等. Modulation of Electrical and Thermal Transports through Lattice Distortion in BaTi1–xNbxO3 Solid Solutions[J]. Nanotechnology,2022.
|
| APA |
Yuqiao Zhang.,Hai Jun Cho.,Feng Jiang.,Chengliang Xia.,Yue Chen.,...&Hiromichi Ohta.(2022).Modulation of Electrical and Thermal Transports through Lattice Distortion in BaTi1–xNbxO3 Solid Solutions.Nanotechnology.
|
| MLA |
Yuqiao Zhang,et al."Modulation of Electrical and Thermal Transports through Lattice Distortion in BaTi1–xNbxO3 Solid Solutions".Nanotechnology (2022).
|
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 126-2022-YQ Zhang-Na（2211KB） | Restricted Access | -- | ||||
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