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.

*This work is supported by the DOE, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515.

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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