TY - JOUR
T1 - Suppression of backward scattering of Dirac fermions in iron pnictides Ba(Fe 1-xRu xAs) 2
AU - Tanabe, Y.
AU - Huynh, K. K.
AU - Urata, T.
AU - Heguri, S.
AU - Mu, G.
AU - Xu, J. T.
AU - Nouchi, R.
AU - Tanigaki, K.
PY - 2012/9/10
Y1 - 2012/9/10
N2 - We report electronic transport of Dirac cones when Fe is replaced by Ru, which has an isoelectronic electron configuration to Fe, using single crystals of Ba(Fe 1-xRu xAs) 2. The electronic transport of parabolic bands is shown to be suppressed by scattering due to the crystal lattice distortion and the impurity effect of Ru, while that of the Dirac cone is not significantly reduced due to the intrinsic character of Dirac cones. It is clearly shown from magnetoresistance and Hall coefficient measurements that the inverse of average mobility, proportional to cyclotron effective mass, develops as the square root of the carrier number (n) of the Dirac cones. This is the unique character of the Dirac cone linear dispersion relationship. Scattering of Ru on the Dirac cones is discussed in terms of the estimated mean free path using experimental parameters.
AB - We report electronic transport of Dirac cones when Fe is replaced by Ru, which has an isoelectronic electron configuration to Fe, using single crystals of Ba(Fe 1-xRu xAs) 2. The electronic transport of parabolic bands is shown to be suppressed by scattering due to the crystal lattice distortion and the impurity effect of Ru, while that of the Dirac cone is not significantly reduced due to the intrinsic character of Dirac cones. It is clearly shown from magnetoresistance and Hall coefficient measurements that the inverse of average mobility, proportional to cyclotron effective mass, develops as the square root of the carrier number (n) of the Dirac cones. This is the unique character of the Dirac cone linear dispersion relationship. Scattering of Ru on the Dirac cones is discussed in terms of the estimated mean free path using experimental parameters.
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U2 - 10.1103/PhysRevB.86.094510
DO - 10.1103/PhysRevB.86.094510
M3 - Article
AN - SCOPUS:84866115815
SN - 0163-1829
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094510
ER -