Abstract
We have performed combined elastic neutron diffuse, electrical transport, specific heat, and thermal conductivity measurements on the quasi–one-dimensional Ba3Co2O6(CO3)0.7 single crystal to characterize its transport properties. A modulated superstructure of polyatomic CO32− is formed, which not only interferes the electronic properties of this compound, but also reduces the thermal conductivity along the c-axis. Furthermore, a large magnetic entropy is observed to be contributed to the heat conduction. Our investigations reveal the influence of both structural and magnetic effects on its transport properties and suggest a theoretical improvement on the thermoelectric materials by building up superlattice with conducting ionic group.
Original language | English |
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Article number | 785801 |
Journal | Frontiers in Physics |
Volume | 9 |
DOIs | |
State | Published - Dec 24 2021 |
Funding
MC, JW, JJ, GW, GL, and JM thank the financial support from the National Science Foundation of China (Nos. 11774223, and U2032213), the interdisciplinary program Wuhan National High Magnetic Field Center (Grant No. WHMFC 202122), Huazhong University of Science and Technology, and the National Key Research and Development Program of China (Grant Nos. 2016YFA0300501 and 2018YFA0704300). GL thanks the project funded by China Postdoctoral Science Foundation (Grant No. 2019M661474). JM thanks a Shanghai talent program. QH and HZ thank the support from NSF-DMR- 2003117. The ND experiment was performed at CORELLI of SNS. VR thanks the project funded by Natural Science Foundation of China (Grant No. QN20200009030). A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. MC, JW, JJ, GW, GL, and JM thank the financial support from the National Science Foundation of China (Nos. 11774223, and U2032213), the interdisciplinary program Wuhan National High Magnetic Field Center (Grant No. WHMFC 202122), Huazhong University of Science and Technology, and the National Key Research and Development Program of China (Grant Nos. 2016YFA0300501 and 2018YFA0704300).
Keywords
- carrier mobility
- cobalt oxide
- neutron diffuse
- scattering mechanism
- spin entropy
- thermal conductivity