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Intralayer doping effects on the high-energy magnetic correlations in NaFeAs

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Pelliciari Jonathan, Huang Yaobo, Das Tanmoy, Dantz Marcus, Bisogni Valentina, Velasco Paul Olalde, Strocov Vladimir N., Xing Lingyi, Wang Xiancheng, Jin Changqing, Schmitt Thorsten,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW B
Volume (Issue) 93(13)
Page(s) 134515
Title of proceedings PHYSICAL REVIEW B
DOI 10.1103/physrevb.93.134515

Open Access

URL https://arxiv.org/abs/1611.03621
Type of Open Access Repository (Green Open Access)

Abstract

We have used resonant inelastic x-ray scattering (RIXS) and dynamical susceptibility calculations to study the magnetic excitations in NaFe1−xCoxAs (x=0, 0.03, and 0.08). Despite a relatively low ordered magnetic moment, collective magnetic modes are observed in parent compounds (x=0) and persist in optimally (x=0.03) and overdoped (x=0.08) samples. Their magnetic bandwidths are unaffected by doping within the range investigated. High-energy magnetic excitations in iron pnictides are robust against doping and present irrespectively of the ordered magnetic moment. Nevertheless, Co doping slightly reduces the overall magnetic spectral weight, differently from previous studies on hole-doped BaFe2As2, where it was observed constant. Finally, we demonstrate that the doping evolution of magnetic modes is different for the dopants being inside or outside the Fe-As layer.
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