Transport properties of the layered Rh oxide K_0.49RhO_2

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.

3 figures, submitted to PRB

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• Optical Study of the Electronic Structure and Correlation Effects in K0.49RhO2
• Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co_{1-x}Rh_xO_{3-δ}
• Correlation in transport coefficients of hole-doped CuRhO${}_2$ single crystals
• Enhanced Seebeck coefficient by a filling-induced Lifshitz transition in KxRhO2
• Chemical tuning between triangular and honeycomb structures in a 5$d$ spin-orbit Mott insulator
• Epitaxially Stabilized Oxide Composed of Twisted Triangular-Lattice Layers
• Anomalous band renormalization due to high energy $kink$ in the colossal thermoelectric material K${}_{0.65}$RhO${}_2$