Spin waves and magnetic exchange interactions in insulating Rb 0.89Fe1.58Se2

Miaoyin Wang; Chen Fang; Dao Xin Yao; Guotai Tan; Leland W. Harriger; Yu Song; Tucker Netherton; Chenglin Zhang; Meng Wang; Matthew B. Stone; Wei Tian; Jiangping Hu; Pengcheng Dai

doi:10.1038/ncomms1573

Spin waves and magnetic exchange interactions in insulating Rb _0.89Fe_1.58Se₂

Miaoyin Wang, Chen Fang, Dao Xin Yao, Guotai Tan, Leland W. Harriger, Yu Song, Tucker Netherton, Chenglin Zhang, Meng Wang, Matthew B. Stone, Wei Tian, Jiangping Hu, Pengcheng Dai

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

90 Scopus citations

Abstract

The parent compounds of iron pnictide superconductors are bad metals with a collinear antiferromagnetic structure and Néel temperatures below 220 K. Although alkaline iron selenide A_yFe_1.6+xSe₂ (A=K, Rb, Cs) superconductors are isostructural with iron pnictides, in the vicinity of the undoped limit they are insulators, forming a block antiferromagnetic order and having Néel temperatures of roughly 500 K. Here we show that the spin waves of the insulating antiferromagnet Rb _0.89Fe_1.58Se₂ can be accurately described by a local moment Heisenberg Hamiltonian. A fitting analysis of the spin wave spectra reveals that the next-nearest neighbour couplings in Rb_0.89Fe _1.58Se₂, (Ba,Ca,Sr)Fe₂As₂, and Fe_1.05 Te are of similar magnitude. Our results suggest a common origin for the magnetism of all the Fe-based superconductors, despite having different ground states and antiferromagnetic orderings.

Original language	English (US)
Article number	580
Journal	Nature communications
Volume	2
Issue number	1
DOIs	https://doi.org/10.1038/ncomms1573
State	Published - 2011
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy

Access to Document

10.1038/ncomms1573

Cite this

@article{aa62b87869784a4b8d2162304c60bd84,

title = "Spin waves and magnetic exchange interactions in insulating Rb 0.89Fe1.58Se2",

abstract = "The parent compounds of iron pnictide superconductors are bad metals with a collinear antiferromagnetic structure and N{\'e}el temperatures below 220 K. Although alkaline iron selenide AyFe1.6+xSe2 (A=K, Rb, Cs) superconductors are isostructural with iron pnictides, in the vicinity of the undoped limit they are insulators, forming a block antiferromagnetic order and having N{\'e}el temperatures of roughly 500 K. Here we show that the spin waves of the insulating antiferromagnet Rb 0.89Fe1.58Se2 can be accurately described by a local moment Heisenberg Hamiltonian. A fitting analysis of the spin wave spectra reveals that the next-nearest neighbour couplings in Rb0.89Fe 1.58Se2, (Ba,Ca,Sr)Fe2As2, and Fe1.05 Te are of similar magnitude. Our results suggest a common origin for the magnetism of all the Fe-based superconductors, despite having different ground states and antiferromagnetic orderings.",

author = "Miaoyin Wang and Chen Fang and Yao, {Dao Xin} and Guotai Tan and Harriger, {Leland W.} and Yu Song and Tucker Netherton and Chenglin Zhang and Meng Wang and Stone, {Matthew B.} and Wei Tian and Jiangping Hu and Pengcheng Dai",

year = "2011",

doi = "10.1038/ncomms1573",

language = "English (US)",

volume = "2",

journal = "Nature communications",

issn = "2041-1723",

publisher = "Nature Publishing Group",

number = "1",

}

TY - JOUR

T1 - Spin waves and magnetic exchange interactions in insulating Rb 0.89Fe1.58Se2

AU - Wang, Miaoyin

AU - Fang, Chen

AU - Yao, Dao Xin

AU - Tan, Guotai

AU - Harriger, Leland W.

AU - Song, Yu

AU - Netherton, Tucker

AU - Zhang, Chenglin

AU - Wang, Meng

AU - Stone, Matthew B.

AU - Tian, Wei

AU - Hu, Jiangping

AU - Dai, Pengcheng

PY - 2011

Y1 - 2011

N2 - The parent compounds of iron pnictide superconductors are bad metals with a collinear antiferromagnetic structure and Néel temperatures below 220 K. Although alkaline iron selenide AyFe1.6+xSe2 (A=K, Rb, Cs) superconductors are isostructural with iron pnictides, in the vicinity of the undoped limit they are insulators, forming a block antiferromagnetic order and having Néel temperatures of roughly 500 K. Here we show that the spin waves of the insulating antiferromagnet Rb 0.89Fe1.58Se2 can be accurately described by a local moment Heisenberg Hamiltonian. A fitting analysis of the spin wave spectra reveals that the next-nearest neighbour couplings in Rb0.89Fe 1.58Se2, (Ba,Ca,Sr)Fe2As2, and Fe1.05 Te are of similar magnitude. Our results suggest a common origin for the magnetism of all the Fe-based superconductors, despite having different ground states and antiferromagnetic orderings.

AB - The parent compounds of iron pnictide superconductors are bad metals with a collinear antiferromagnetic structure and Néel temperatures below 220 K. Although alkaline iron selenide AyFe1.6+xSe2 (A=K, Rb, Cs) superconductors are isostructural with iron pnictides, in the vicinity of the undoped limit they are insulators, forming a block antiferromagnetic order and having Néel temperatures of roughly 500 K. Here we show that the spin waves of the insulating antiferromagnet Rb 0.89Fe1.58Se2 can be accurately described by a local moment Heisenberg Hamiltonian. A fitting analysis of the spin wave spectra reveals that the next-nearest neighbour couplings in Rb0.89Fe 1.58Se2, (Ba,Ca,Sr)Fe2As2, and Fe1.05 Te are of similar magnitude. Our results suggest a common origin for the magnetism of all the Fe-based superconductors, despite having different ground states and antiferromagnetic orderings.

UR - http://www.scopus.com/inward/record.url?scp=84455171659&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84455171659&partnerID=8YFLogxK

U2 - 10.1038/ncomms1573

DO - 10.1038/ncomms1573

M3 - Article

C2 - 22146399

AN - SCOPUS:84455171659

SN - 2041-1723

VL - 2

JO - Nature communications

JF - Nature communications

IS - 1

M1 - 580

ER -

Spin waves and magnetic exchange interactions in insulating Rb _0.89Fe_1.58Se₂

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this