Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu3 (OH)6 Cl2

Danna E. Freedman...[et al.]; T. H. Han; Andrea Prodi

doi:10.1021/ja1070398

Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu₃ (OH)₆ Cl₂

Danna E. Freedman...[et al.], T. H. Han, Andrea Prodi

119 Citationer (Scopus)

Abstract

Structural characterization, exploiting X-ray scattering differences at elemental absorption edges, is developed to quantitatively determine crystallographic site-specific metal disorder. We apply this technique to the problem of Zn-Cu chemical disorder in ZnCu₃(OH)₆Cl ₂. This geometrically frustrated kagomé antiferromagnet is one of the best candidates for a spin-liquid ground state, but chemical disorder has been suggested as a mundane explanation for its magnetic properties. Using anomalous scattering at the Zn and Cu edges, we determine that there is no Zn occupation of the intralayer Cu sites within the kagomé layer; however there is Cu present on the Zn intersite, leading to a structural formula of (Zn_0.85Cu_0.15)Cu₃(OH)₆Cl ₂. The lack of Zn mixing onto the kagomé lattice sites lends support to the idea that the electronic ground state in ZnCu₃(OH) ₆Cl₂ and its relatives is nontrivial.

Originalsprog	Engelsk
Tidsskrift	Journal of the American Chemical Society
Vol/bind	132
Udgave nummer	45
Sider (fra-til)	16185-16190
Antal sider	5
ISSN	0002-7863
DOI	https://doi.org/10.1021/ja1070398
Status	Udgivet - 17 nov. 2010

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10.1021/ja1070398

Citationsformater

@article{2d53e923c5424e93bf8e85d9d3336064,

title = "Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu3 (OH)6 Cl2",

abstract = "Structural characterization, exploiting X-ray scattering differences at elemental absorption edges, is developed to quantitatively determine crystallographic site-specific metal disorder. We apply this technique to the problem of Zn-Cu chemical disorder in ZnCu3(OH)6Cl 2. This geometrically frustrated kagom{\'e} antiferromagnet is one of the best candidates for a spin-liquid ground state, but chemical disorder has been suggested as a mundane explanation for its magnetic properties. Using anomalous scattering at the Zn and Cu edges, we determine that there is no Zn occupation of the intralayer Cu sites within the kagom{\'e} layer; however there is Cu present on the Zn intersite, leading to a structural formula of (Zn0.85Cu0.15)Cu3(OH)6Cl 2. The lack of Zn mixing onto the kagom{\'e} lattice sites lends support to the idea that the electronic ground state in ZnCu3(OH) 6Cl2 and its relatives is nontrivial.",

author = "{Freedman...[et al.]}, {Danna E.} and Han, {T. H.} and Andrea Prodi",

year = "2010",

month = nov,

day = "17",

doi = "10.1021/ja1070398",

language = "English",

volume = "132",

pages = "16185--16190",

journal = "Journal of the American Chemical Society",

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TY - JOUR

T1 - Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu3 (OH)6 Cl2

AU - Freedman...[et al.], Danna E.

AU - Han, T. H.

AU - Prodi, Andrea

PY - 2010/11/17

Y1 - 2010/11/17

N2 - Structural characterization, exploiting X-ray scattering differences at elemental absorption edges, is developed to quantitatively determine crystallographic site-specific metal disorder. We apply this technique to the problem of Zn-Cu chemical disorder in ZnCu3(OH)6Cl 2. This geometrically frustrated kagomé antiferromagnet is one of the best candidates for a spin-liquid ground state, but chemical disorder has been suggested as a mundane explanation for its magnetic properties. Using anomalous scattering at the Zn and Cu edges, we determine that there is no Zn occupation of the intralayer Cu sites within the kagomé layer; however there is Cu present on the Zn intersite, leading to a structural formula of (Zn0.85Cu0.15)Cu3(OH)6Cl 2. The lack of Zn mixing onto the kagomé lattice sites lends support to the idea that the electronic ground state in ZnCu3(OH) 6Cl2 and its relatives is nontrivial.

AB - Structural characterization, exploiting X-ray scattering differences at elemental absorption edges, is developed to quantitatively determine crystallographic site-specific metal disorder. We apply this technique to the problem of Zn-Cu chemical disorder in ZnCu3(OH)6Cl 2. This geometrically frustrated kagomé antiferromagnet is one of the best candidates for a spin-liquid ground state, but chemical disorder has been suggested as a mundane explanation for its magnetic properties. Using anomalous scattering at the Zn and Cu edges, we determine that there is no Zn occupation of the intralayer Cu sites within the kagomé layer; however there is Cu present on the Zn intersite, leading to a structural formula of (Zn0.85Cu0.15)Cu3(OH)6Cl 2. The lack of Zn mixing onto the kagomé lattice sites lends support to the idea that the electronic ground state in ZnCu3(OH) 6Cl2 and its relatives is nontrivial.

U2 - 10.1021/ja1070398

DO - 10.1021/ja1070398

M3 - Journal article

C2 - 20964423

SN - 0002-7863

VL - 132

SP - 16185

EP - 16190

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 45

ER -

Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu3 (OH)6 Cl2

Abstract

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Site specific X-ray anomalous dispersion of the geomerically frustrated kagom magnetic, herbertsmithite , ZnCu₃ (OH)₆ Cl₂