Effect of Pnictogen Height on Spin Waves in Iron Pnictides

Published

May 28, 2014

Author(s)

Chenglin Zhang, Leland Harriger, Zhiping Yin, Weicheng Lv, Miaoyin Wang, Guotai Tan, Yu Song, D. L. Abernathy, Wei Tian, Takeshi Egami, Kristjan Haule, Gabriel Kotliar, Pengcheng Dai

Abstract

We use inelastic neutron scattering to study spin waves in the antiferromagnetic ordered phase of iron pnictide NaFeAs throughout the Brillouin zone. Comparing with the well-studied AFe₂As₂ (A = Ca,Sr,Ba) family, spin waves in NaFeAs have considerably lower zone boundary energies and more isotropic effective in-plane magnetic exchange couplings. These results are consistent with calculations from a combined density functional theory (DFT) and dynamical mean field theory (DMFT), and provide strong evidence that pnictogen height controls the strength of electron-electron correlations, and consequently the effective bandwidth of magnetic excitations.

Citation

Physical Review Letters

Volume

112

Issue

21

Pub Type

Journals

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Keywords

superconductivity, strongly correlated electrons

Citation

Zhang, C. , Harriger, L. , Yin, Z. , Lv, W. , Wang, M. , Tan, G. , Song, Y. , Abernathy, D. , Tian, W. , Egami, T. , Haule, K. , Kotliar, G. and Dai, P. (2014), Effect of Pnictogen Height on Spin Waves in Iron Pnictides, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916202 (Accessed April 29, 2024)