Depotassiation of K0.62RhO2 and electronic property of the end-product K0.32RhO2 single crystal. (March 2016)

• Record Type: Journal Article
• Authors: Zhang, Bin-Bin; Lv, Yang-Yang; Dong, Song-Tao; Zhang, Lun-Yong; Yao, Shu-Hua; Chen, Y.B.; Zhang, Shan-Tao; Zhou, Jian; Chen, Yan-Feng
• Is Part Of: Solid state communications. Volume 230(2016)
• Page Start: 1
• Page End: 5
• Publication Date: 2016-03
• Subjects: A. K0.32RhO2 -- B. Chemical depotassiation -- C. Structure -- D. Electronic properties; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2016.01.003
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: K x RhO2, as an isomorphism material to Na x CoO2, is theoretically predicted to have rich physical properties. In this letter, we studied the chemical depotassiation process of K0.62 RhO2 crystals to obtain K x RhO2 with x varied from 0.32 to 0.62. And an end-product K0.32 RhO2 with single phase determined through XRD refinement belongs to space group P6 3 /mmc (No. 194). Electrical transport, magneto-resistant transport and Hall measurements substantiate that K0.32 RhO2 is a multi-band normal metal, which can be well described by Landau Fermi liquid theory. Our finding sheds more light on the preparation and transport properties of layered oxides. Highlights: By controlling chemical depotassiation, the end-product K0.32 RhO2 crystal with single phase is obtained from K0.62 RhO2 . It's a multiband bad metal with the strong anisotropy transport behavior. And it can be well described by Landau Fermi liquid theory.