Linear magnetoresistance in the underdoped iron pnictide Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$

ORAL

Abstract

BaFe$_2$As$_2$ suffers an antiferromagnetic transition which has been described in terms of a nodal spin density wave. The material exhibits a striking linear magnetoresistance in the low temperature antiferromagnetic state, possibly related to the unique character of the reconstructed Fermi surface. Here we present data showing the evolution of the magnetoresistance as a function of both composition and temperature for the specific case of Ba(Fe$_{1- x}$Co$_x$)$_2$As$_2$, revealing a correlation with other transport properties, including the in-plane resistivity anisotropy.

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Authors

  • Jiun-Haw Chu

    Stanford University

  • Hsueh-Hui Kuo

    Stanford University

  • Scott Riggs

    Stanford University, Stanford, National High Magnetic Field Laboratory, Florida State University

  • James Analytis

    Stanford University, Stanford institute for materials and energy science, SLAC, SLAC, Stanford University, SLAC

  • Ian Fisher

    Department of Applied Physics, Stanford University, Stanford University, Stanford institute for materials and energy science, SLAC, SLAC, Stanford University, Stanford