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Electronic structure and quantum criticality in Ba(Fe1-x-yCoxMny)2As2, an ARPES study

E. D. L. Rienks, T. Wolf, K. Koepernik, I. Avigo, P. Hlawenka, C. Lupulescu, T. Arion, F. Roth, W. Eberhardt, U. Bovensiepen, J. Fink
2013 Europhysics letters  

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2013 pre-print arXiv:1301.4365v1 fatcat:7nwcj2tryzclvnzwvz52d5zfp4

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2013 accepted
arXiv:1301.4365v2 fatcat:xuzqc22wkvhzzn5g4jaqr6gf4m
We used angle-resolved photoemission spectroscopy (ARPES) and density functional theory calculations to study the electronic structure of Ba(Fe1-x-yCoxMny)2As2 for x=0.06 and 0<=y <=0.07. From ARPES we derive that the substitution of Fe by Mn does not lead to hole doping, indicating a localization of the induced holes. An evaluation of the measured spectral function does not indicate a diverging effective mass or scattering rate near optimal doping. Thus the present ARPES results indicate a
more » ... inuous evolution of the quasiparticle interaction and therefore question previous quantum critical scenarios.
doi:10.1209/0295-5075/103/47004 fatcat:ktcyqb2gsjerplqj7qymm7z3uu
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E. D. L. Rienks, T. Wolf, K. Koepernik, I. Avigo, P. Hlawenka, C. Lupulescu, T. Arion, F. Roth, W. Eberhardt, U. Bovensiepen, J. Fink. "Electronic structure and quantum criticality in Ba(Fe1-x-yCoxMny)2As2, an ARPES study." Europhysics letters 103.4 (2013) 47004