TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.17.5.141
TI  - Hole doping and electronic correlations in Cr substituted BaFe$_{2}$As$_{2}$
PY  - 2024/11/22
UR  - https://scipost.org/SciPostPhys.17.5.141
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 17
IS  - 5
SP  - 141
A1  - dos Reis Cantarino, Marli
AU  - Pakuszewski, Kevin R.
AU  - Salzmann, Bjoern
AU  - Moya, Pedro H. A.
AU  - da Silva Neto, Wagner R.
AU  - Freitas, Gabriel S.
AU  - Pagliuso, Pascoal G.
AU  - Adriano, Cris
AU  - Brito, Walber H.
AU  - Garcia, Fernando A.
AB  - For a significant composition range, the suppression of the spin density wave transition temperature ($T_{\text{SDW}}$) in Cr- and Mn-substituted BaFe$_{2}$As$_{2}$ (CrBFA and MnBFA, respectively) coincides as a function of Cr/Mn content, despite the distinct electronic effects of these substitutions. Additionally, for any Cr/Mn content superconductivity (SC) is absent and this topic is particularly less explored in the case of CrBFA. In this work, we employ angle-resolved photoemission spectroscopy (ARPES) and combined density functional theory plus dynamical mean field theory (DFT+DMFT) to address the evolution of the Fermi surface (FS) and electronic correlations in CrBFA. Our findings reveal that incorporating Cr leads to an effective hole doping of the states near the FS, which is well described within the virtual crystal approximation (VCA). Moreover, analysis of the ARPES spectra of the bands with main $d_{yz}$-orbital character reveals a fractional scaling of the imaginary part of self-energy as a function of the binding energy, a signature property of Hund's correlations. Our DFT+DMFT calculations support these experimental findings. We conclude that CrBFA is a correlated electron system for which the changes in the FS as a function of Cr are unrelated to the suppression of $T_{\text{SDW}}$. In addition, we suggest that the absence of SC is primarily due to the competition between Cr local moments and the Fe-derived itinerant spin fluctuations.
ER  -

@Article{10.21468/SciPostPhys.17.5.141,
	title={{Hole doping and electronic correlations in Cr substituted BaFe$_{2}$As$_{2}$}},
	author={Marli dos Reis Cantarino and Kevin R. Pakuszewski and Bjoern Salzmann and Pedro H. A. Moya and Wagner R. da Silva Neto and Gabriel S. Freitas and Pascoal G. Pagliuso and Cris Adriano and Walber H. Brito and Fernando A. Garcia},
	journal={SciPost Phys.},
	volume={17},
	pages={141},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.17.5.141},
	url={https://scipost.org/10.21468/SciPostPhys.17.5.141},
}