Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs

Meng Wang; X. C. Wang; D. L. Abernathy; L. W. Harriger; H. Q. Luo; Yang Zhao; J. W. Lynn; Q. Q. Liu; C. Q. Jin; Chen Fang; Jiangping Hu; Pengcheng Dai

doi:10.1103/PhysRevB.83.220515

Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li_1-xFeAs

Meng Wang, X. C. Wang, D. L. Abernathy, L. W. Harriger, H. Q. Luo, Yang Zhao, J. W. Lynn, Q. Q. Liu, C. Q. Jin, Chen Fang, Jiangping Hu, Pengcheng Dai

Direct Geometry

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

35 Scopus citations

Abstract

We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li_1-xFeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi surface nesting conditions for antiferromagnetic (AF) order, spin excitations in Li_1-xFeAs occur at the AF wave vectors Q=(1,0) at low energies, but move to wave vectors Q=(±0.5,±0.5) near the zone boundary with a total magnetic bandwidth comparable to that of BaFe₂As₂. These results reveal that AF spin excitations still dominate the low-energy physics of these materials and suggest both itinerancy and strong electron-electron correlations are essential to understand the measured magnetic excitations.

Original language	English
Article number	220515
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.83.220515
State	Published - Jun 24 2011

Access to Document

10.1103/PhysRevB.83.220515

Cite this

@article{fa8cadd3453e462ab1204a97417b2838,

title = "Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs",

abstract = "We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li1-xFeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi surface nesting conditions for antiferromagnetic (AF) order, spin excitations in Li1-xFeAs occur at the AF wave vectors Q=(1,0) at low energies, but move to wave vectors Q=(±0.5,±0.5) near the zone boundary with a total magnetic bandwidth comparable to that of BaFe2As2. These results reveal that AF spin excitations still dominate the low-energy physics of these materials and suggest both itinerancy and strong electron-electron correlations are essential to understand the measured magnetic excitations.",

author = "Meng Wang and Wang, {X. C.} and Abernathy, {D. L.} and Harriger, {L. W.} and Luo, {H. Q.} and Yang Zhao and Lynn, {J. W.} and Liu, {Q. Q.} and Jin, {C. Q.} and Chen Fang and Jiangping Hu and Pengcheng Dai",

year = "2011",

month = jun,

day = "24",

doi = "10.1103/PhysRevB.83.220515",

language = "English",

volume = "83",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "22",

}

TY - JOUR

T1 - Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs

AU - Wang, Meng

AU - Wang, X. C.

AU - Abernathy, D. L.

AU - Harriger, L. W.

AU - Luo, H. Q.

AU - Zhao, Yang

AU - Lynn, J. W.

AU - Liu, Q. Q.

AU - Jin, C. Q.

AU - Fang, Chen

AU - Hu, Jiangping

AU - Dai, Pengcheng

PY - 2011/6/24

Y1 - 2011/6/24

N2 - We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li1-xFeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi surface nesting conditions for antiferromagnetic (AF) order, spin excitations in Li1-xFeAs occur at the AF wave vectors Q=(1,0) at low energies, but move to wave vectors Q=(±0.5,±0.5) near the zone boundary with a total magnetic bandwidth comparable to that of BaFe2As2. These results reveal that AF spin excitations still dominate the low-energy physics of these materials and suggest both itinerancy and strong electron-electron correlations are essential to understand the measured magnetic excitations.

AB - We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li1-xFeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi surface nesting conditions for antiferromagnetic (AF) order, spin excitations in Li1-xFeAs occur at the AF wave vectors Q=(1,0) at low energies, but move to wave vectors Q=(±0.5,±0.5) near the zone boundary with a total magnetic bandwidth comparable to that of BaFe2As2. These results reveal that AF spin excitations still dominate the low-energy physics of these materials and suggest both itinerancy and strong electron-electron correlations are essential to understand the measured magnetic excitations.

UR - http://www.scopus.com/inward/record.url?scp=79961144307&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.83.220515

DO - 10.1103/PhysRevB.83.220515

M3 - Article

AN - SCOPUS:79961144307

SN - 1098-0121

VL - 83

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

M1 - 220515

ER -

Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li_1-xFeAs

Abstract

Access to Document

Other files and links

Fingerprint

Cite this