Title |
-
en
Thermoelectric phase diagram of the SrTiO3-SrNbO3 solid solution system
|
Creator |
|
Accessrights |
open access |
Rights |
-
en
The following article appeared in J. Appl. Phys. 121, 185102 (2017) and may be found at http://dx.doi.org/10.1063/1.4983359
|
Subject |
|
Description |
-
Abstract
en
Here, we present a thermoelectric phase diagram for the SrTi1-xNbxO3 (0.05 <= x <= 1) solid solution system, which we derived from the characterization of epitaxial films. We observed two thermoelectric phase boundaries in the system, which originate from the step-like decrease in carrier effective mass at x similar to 0.3 and from a local minimum in carrier relaxation time at x similar to 0.5. The origins of these phase boundaries are considered to be related to isovalent/heterovalent B-site substitution: parabolic Ti 3d orbitals dominate electron conduction for compositions with x < 0.3, whereas the Nb 4 d orbital dominates when x > 0.3. At x similar to 0.5, a tetragonal distortion of the lattice, in which the B-site is composed of Ti4+ and Nb4+ ions, leads to the formation of tail-like impurity bands, which maximizes the electron scattering. These results provide a foundation for further research into improving the thermoelectric performance of SrTi1-xNbxO3. Published by AIP Publishing.
|
Publisher |
en
American Institute of Physics (AIP)
|
Date |
|
Language |
|
Resource Type |
journal article |
Version Type |
VoR |
Identifier |
HDL
http://hdl.handle.net/2115/70213
|
Relation |
-
isIdenticalTo
DOI
https://doi.org/10.1063/1.4983359
|
Journal |
-
-
en
Journal of Applied Physics
-
Volume Number121
Issue Number18
Page Start185102
|
File |
|
Oaidate |
2023-07-26 |