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

Pelliciari, Jonathan and Huang, Yaobo and Das, Tanmoy and Dantz, Marcus and Bisogni, Valentina and Velasco, Paul Olalde and Strocov, Vladimir N and Xing, Lingyi and Wang, Xiancheng and Jin, Changqing and Schmitt, Thorsten (2016) Intralayer doping effects on the high-energy magnetic correlations in NaFeAs. In: PHYSICAL REVIEW B, 93 (13).

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Official URL: http://dx.doi.org/10.1103/PhysRevB.93.134515

Abstract

We have used resonant inelastic x-ray scattering (RIXS) and dynamical susceptibility calculations to study the magnetic excitations in NaFe1-x Co-x As (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.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 11 Jun 2016 05:56
Last Modified: 11 Jun 2016 05:56
URI: http://eprints.iisc.ac.in/id/eprint/53893

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