Transport properties of the layered Rh oxide K_0.49RhO_2
S. Shibasaki, T. Nakano, I. Terasaki, K. Yubuta, and T. Kajitani
TL;DR
This study investigates the electrical transport properties of layered K_0.49RhO_2, revealing Fermi-liquid behavior and the influence of Rh triangular lattice structure on its transport phenomena.
Contribution
It provides detailed measurements of resistivity, thermopower, and Hall effect in K_0.49RhO_2, highlighting differences from Na_xCoO_2 due to band width variations.
Findings
Resistivity proportional to T^2 up to 300 K
Thermopower proportional to T up to 140 K
Hall coefficient increases linearly with temperature above 100 K
Abstract
We report measurements and analyses of resistivity, thermopower and Hall coefficient of single-crystalline samples of the layered Rh oxide K_0.49RhO_2. The resistivity is proportional to the square of temperature up to 300 K, and the thermopower is proportional to temperature up to 140 K. The Hall coefficient increases linearly with temperature above 100 K, which is ascribed to the triangular network of Rh in this compound. The different transport properties between Na_xCoO_2 and K_0.49RhO_2 are discussed on the basis of the different band width between Co and Rh evaluated from the magnetotransport.
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