Metal-insulator transition in Ca1-xLixPd3O4

[摘要] Metal-insulator transition in Ca1-xLixPd3O4 has been studied through charge transport measurements. The resistivity, the Seebeck coefficient, and the Hall coefficient are consistently explained in terms of a simple one-band picture, where a hole with a moderately enhanced mass is itinerant three dimensionally. Contrary to the theoretical prediction [Phys. Rev. B 62, 13 426 (2000)], CaPd3O4 is unlikely to be an excitonic insulator, and holds a finite carrier concentration down to 4.2 K. Thus the metal-insulator transition in this system is basically driven by localization effects.

[发布日期] 2003-12-01

[关键词] CA1-XNAXPD3O4;CAPD3O4