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arXiv 0911.2156cond-mat.str-el
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层状Rh氧化物K_0.49RhO_2的输运性质

Transport properties of the layered Rh oxide K_0.49RhO_2

S. Shibasaki, T. Nakano, I. Terasaki, K. Yubuta, T. Kajitani

摘要:

本文报道了层状Rh氧化物K_0.49RhO_2单晶样品的电阻率、热电势和霍尔系数的测量和分析。电阻率在300 K以下与温度的平方成正比,热电势在140 K以下与温度成正比。当温度高于100 K时,霍尔系数随温度的升高而线性增加,这归因于Rh在该化合物中的三角形网络结构。根据磁输运计算得到的Co和Rh的带宽不同,讨论了Na_xCoO_2和K_0.49RhO_2之间的不同输运性质。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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