Metal-insulator transition in Ca_{1-x}Li_xPd_3O_4

Details Metal-insulator transition in Ca_{1-x}Li_xPd_3O_4 Metal-insulator transition in Ca_{1-x}Li_xPd_3O_4

2003-09-13

arxiv.org/abs/cond-mat/0309335v1

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX4 format, 4 pages, 5 eps figures

Scientific paper

10.1103/PhysRevB.68.233101

Metal-insulator transition in Ca_{1-x}Li_xPd_3O_4 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. B62, 13426 (2000)], CaPd_3O_4 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.

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