| Autor: |
Ishida, Y., Mizutani, A., Sugiura, K., Ohta, H., Koumoto, K. |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 82, 075325 (2010) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.82.075325 |
| Popis: |
We investigate the transport properties of LixCoO2 thin films whose resistivities are nearly an order of magnitude lower than those of the bulk polycrystals. A metal-nonmetal transition occurs at ~0.8 in a biphasic domain, and the Seebeck coefficient (S) is drastically increased at ~140 K (= T*) with increasing the Li concentration to show a peak of magnitude ~120 \muV/K in the S-T curve of x = 0.87. We show that T* corresponds to a crossover temperature in the conduction, most likely reflecting the correlation-induced temperature dependence in the low-energy excitations. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
