Effect of pnictogen height on spin waves in iron pnictides

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

doi:10.1103/PhysRevLett.112.217202

Effect of pnictogen height on spin waves in iron pnictides

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

School of Arts and Sciences, Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

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 and dynamical mean field theory and provide strong evidence that pnictogen height controls the strength of electron-electron correlations and consequently the effective bandwidth of magnetic excitations.

Original language	English (US)
Article number	217202
Journal	Physical review letters
Volume	112
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.112.217202
State	Published - May 28 2014

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.112.217202

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title = "Effect of pnictogen height on spin waves in iron pnictides",

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 and dynamical mean field theory and provide strong evidence that pnictogen height controls the strength of electron-electron correlations and consequently the effective bandwidth of magnetic excitations.",

author = "Chenglin Zhang and Harriger, {Leland W.} and Zhiping Yin and Weicheng Lv and Miaoyin Wang and Guotai Tan and Yu Song and Abernathy, {D. A.} and Wei Tian and Takeshi Egami and Kristjan Haule and Gabriel Kotliar and Pengcheng Dai",

year = "2014",

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day = "28",

doi = "10.1103/PhysRevLett.112.217202",

language = "English (US)",

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TY - JOUR

T1 - Effect of pnictogen height on spin waves in iron pnictides

AU - Zhang, Chenglin

AU - Harriger, Leland W.

AU - Yin, Zhiping

AU - Lv, Weicheng

AU - Wang, Miaoyin

AU - Tan, Guotai

AU - Song, Yu

AU - Abernathy, D. A.

AU - Tian, Wei

AU - Egami, Takeshi

AU - Haule, Kristjan

AU - Kotliar, Gabriel

AU - Dai, Pengcheng

PY - 2014/5/28

Y1 - 2014/5/28

N2 - 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 and dynamical mean field theory and provide strong evidence that pnictogen height controls the strength of electron-electron correlations and consequently the effective bandwidth of magnetic excitations.

AB - 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 and dynamical mean field theory and provide strong evidence that pnictogen height controls the strength of electron-electron correlations and consequently the effective bandwidth of magnetic excitations.

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DO - 10.1103/PhysRevLett.112.217202

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Effect of pnictogen height on spin waves in iron pnictides

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