Journal Article

DESY-2014-00142

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electronic structure and quantum criticality in $\mathrm{Ba(Fe_{1-x-y}Co_xMn_y)^2As_2}$, an ARPES study

Rienks, E. D. L. (Corresponding author) ; Wolf, T. ; Koepernik, K. ; Avigo, I. ; Hlawenka, P. ; Lupulescu, C. ; Arion, T.DESY* ; Roth, F.DESY*>CFEL* ; Eberhardt, W.DESY*>CFEL* ; Bovensiepen, U. ; Fink, J.

2013
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1209/0295-5075/103/47004  doi:10.3204/DESY-2014-00142

Abstract: We used angle-resolved photoemission spectroscopy (ARPES) and density functional theory calculations to study the electronic structure of $\text{Ba(Fe}_{1-x-y}\text{Co}_{x}\text{Mn}_{y})_{2}\text{As}_{2}$ for $x=0.06$ and $0\le y \le 0.07$ . 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 continuous evolution of the quasiparticle interaction and therefore question previous quantum critical scenarios.

Note: (c) EPLA

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Contributing Institute(s):

1. Advanced Study Group of the University of Hamburg (UNI-ASG)

Research Program(s):

1. 54x - Programm Forschung mit Photonen, Neutronen, Ionen - Topic unbekannt (POF2-54x) (POF2-54x)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2013

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Database coverage:
; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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