Volume 125, Number 3, February 2019
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||11 March 2019|
Detecting the orbital character of the spin fluctuation in the iron-based superconductors with the resonant inelastic X-ray scattering spectroscopy
Department of Physics, Renmin University of China - Beijing 100872, PRC
Received: 16 August 2018
Accepted: 8 February 2019
The orbital distribution of the spin fluctuation in the iron-based superconductors (IBSs) is the key information needed to understand the magnetism, superconductivity and electronic nematicity in these multi-orbital systems. In this work, we propose that the resonant inelastic X-ray scattering (RIXS) technique can be used to probe selectively the spin fluctuation on different Fe 3d orbitals. In particular, the spin fluctuation on the three t2g orbitals, namely, the 3dxz, 3dyz and the 3dxy orbital, can be selectively probed in the scattering geometry by aligning the direction of the outgoing photon in the y-, x- and z-direction. Such orbital-resolved information on the spin fluctuation is invaluable for the study of the orbital-selective physics in the IBSs and can greatly advance our understanding of the relation between orbital ordering and spin nematicity in the IBSs and the orbital-selective pairing mechanism in these multi-orbital systems.
PACS: 74.70.Xa – Pnictides and chalcogenides / 75.25.Dk – Orbital, charge, and other orders, including coupling of these orders / 78.70.Ck – X-ray scattering
© EPLA, 2019
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