Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y${}_{1\ensuremath{-}x}$Cd${}_{x}$)${}_{2}$Mo${}_{2}$O${}_{7}$ with frustrated pyrochlore lattice

Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y $_{1 - x}$ Cd $_{x}$ ) $_{2}$ Mo $_{2}$ O $_{7}$ with frustrated pyrochlore lattice

S. Iguchi, Y. Kumano, K. Ueda, S. Kumakura, and Y. Tokura

Phys. Rev. B 84, 174416 – Published 14 November 2011

Abstract

To explore novel spin-charge coupled phenomena in the strongly correlated electron system with frustrated lattice, charge transport and dynamics have been investigated for the hole-doped spin-glass (Mott) insulator (Y $_{1 - x}$ Cd $_{x}$ ) $_{2}$ Mo $_{2}$ O $_{7}$ with pyrochlore structure. Coincident with the disappearance of spin-glass state by hole doping, a diffusive metallic transport with strongly renormalized electron mass shows up with no long range spin order, which is caused by strong antiferromagnetic spin fluctuation.

Received 7 October 2011

DOI:https://doi.org/10.1103/PhysRevB.84.174416

Authors & Affiliations

S. Iguchi¹, Y. Kumano¹, K. Ueda¹, S. Kumakura¹, and Y. Tokura^1,2,3

¹Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
²Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), Wako, 351-0198, Japan
³Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG), RIKEN Advanced Science Institute, Wako 351-0198, Japan

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Vol. 84, Iss. 17 — 1 November 2011

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Physical Review B

covering condensed matter and materials physics

Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y $_{1 - x}$ Cd $_{x}$ ) $_{2}$ Mo $_{2}$ O $_{7}$ with frustrated pyrochlore lattice

S. Iguchi, Y. Kumano, K. Ueda, S. Kumakura, and Y. Tokura

Phys. Rev. B 84, 174416 – Published 14 November 2011

Abstract

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Physical Review B

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Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y1−xCdx)2Mo2O7 with frustrated pyrochlore lattice

S. Iguchi, Y. Kumano, K. Ueda, S. Kumakura, and Y. Tokura

Phys. Rev. B 84, 174416 – Published 14 November 2011

Abstract

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Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y $_{1 - x}$ Cd $_{x}$ ) $_{2}$ Mo $_{2}$ O $_{7}$ with frustrated pyrochlore lattice