Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH4 ]2[C7H14N][V7O6F18]

L. Clark; J. C. Orain; F. Bert; M. A. De Vries; Farida Himeur Himeur; Russell Edward Morris; Philip Lightfoot; J. S. Lord; M. T. F. Telling; P. Bonville; J. P. Attfield; P. Mendels; A. Harrison

doi:10.1103/PhysRevLett.110.207208

Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH₄ ]₂[C₇H₁₄N][V₇O₆F₁₈]

L. Clark, J. C. Orain, F. Bert, M. A. De Vries, Farida Himeur Himeur, Russell Edward Morris, Philip Lightfoot, J. S. Lord, M. T. F. Telling, P. Bonville, J. P. Attfield^*, P. Mendels, A. Harrison

^*Corresponding author for this work

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

Abstract

The vanadium oxyfluoride [NH₄]₂[C₇H₁₄N][V₇O₆F₁₈] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S=½ kagome planes of V⁴⁺d¹ ions with S=1 V³⁺ d2 ions located between the kagome layers. Muon spin relaxation measurements demonstrate the absence of spin freezing down to 40 mK despite an energy scale of 60 K for antiferromagnetic exchange interactions. From magnetization and heat capacity measurements we conclude that the S=1 spins of the interplane V³⁺ ions are weakly coupled to the kagome layers, such that DQVOF can be viewed as an experimental model for S=½ kagome physics, and that it displays a gapless spin liquid ground state.

Original language	English
Article number	207208
Number of pages	5
Journal	Physical Review Letters
Volume	110
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.110.207208
Publication status	Published - 16 May 2013

Keywords

Lattice
Vanadium oxyfluoride
Antiferromagnetic exchange
Kagome layers

Access to Document

10.1103/PhysRevLett.110.207208

DQVOF_PRL
© 2013 American Physical Society. The online publisher's version of this article can be found at http://prl.aps.org/abstract/PRL/v110/i20/e207208.
Accepted author manuscript, 608 KB

Cite this

Clark, L., Orain, J. C., Bert, F., De Vries, M. A., Himeur, F. H., Morris, R. E., Lightfoot, P., Lord, J. S., Telling, M. T. F., Bonville, P., Attfield, J. P., Mendels, P., & Harrison, A. (2013). Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH₄ ]₂[C₇H₁₄N][V₇O₆F₁₈]. Physical Review Letters, 110(20), Article 207208. https://doi.org/10.1103/PhysRevLett.110.207208

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title = "Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH4 ]2[C7H14N][V7O6F18]",

abstract = "The vanadium oxyfluoride [NH4]2[C7H14N][V7O6F18] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S=½ kagome planes of V4+ d1 ions with S=1 V3+ d2 ions located between the kagome layers. Muon spin relaxation measurements demonstrate the absence of spin freezing down to 40 mK despite an energy scale of 60 K for antiferromagnetic exchange interactions. From magnetization and heat capacity measurements we conclude that the S=1 spins of the interplane V3+ ions are weakly coupled to the kagome layers, such that DQVOF can be viewed as an experimental model for S=½ kagome physics, and that it displays a gapless spin liquid ground state.",

keywords = "Lattice, Vanadium oxyfluoride , Antiferromagnetic exchange , Kagome layers",

author = "L. Clark and Orain, {J. C.} and F. Bert and {De Vries}, {M. A.} and Himeur, {Farida Himeur} and Morris, {Russell Edward} and Philip Lightfoot and Lord, {J. S.} and Telling, {M. T. F.} and P. Bonville and Attfield, {J. P.} and P. Mendels and A. Harrison",

year = "2013",

month = may,

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doi = "10.1103/PhysRevLett.110.207208",

language = "English",

volume = "110",

journal = "Physical Review Letters",

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Clark, L, Orain, JC, Bert, F, De Vries, MA, Himeur, FH, Morris, RE , Lightfoot, P, Lord, JS, Telling, MTF, Bonville, P, Attfield, JP, Mendels, P & Harrison, A 2013, 'Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH₄ ]₂[C₇H₁₄N][V₇O₆F₁₈]', Physical Review Letters, vol. 110, no. 20, 207208. https://doi.org/10.1103/PhysRevLett.110.207208

TY - JOUR

T1 - Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH4 ]2[C7H14N][V7O6F18]

AU - Clark, L.

AU - Orain, J. C.

AU - Bert, F.

AU - De Vries, M. A.

AU - Himeur, Farida Himeur

AU - Morris, Russell Edward

AU - Lightfoot, Philip

AU - Lord, J. S.

AU - Telling, M. T. F.

AU - Bonville, P.

AU - Attfield, J. P.

AU - Mendels, P.

AU - Harrison, A.

PY - 2013/5/16

Y1 - 2013/5/16

N2 - The vanadium oxyfluoride [NH4]2[C7H14N][V7O6F18] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S=½ kagome planes of V4+ d1 ions with S=1 V3+ d2 ions located between the kagome layers. Muon spin relaxation measurements demonstrate the absence of spin freezing down to 40 mK despite an energy scale of 60 K for antiferromagnetic exchange interactions. From magnetization and heat capacity measurements we conclude that the S=1 spins of the interplane V3+ ions are weakly coupled to the kagome layers, such that DQVOF can be viewed as an experimental model for S=½ kagome physics, and that it displays a gapless spin liquid ground state.

AB - The vanadium oxyfluoride [NH4]2[C7H14N][V7O6F18] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S=½ kagome planes of V4+ d1 ions with S=1 V3+ d2 ions located between the kagome layers. Muon spin relaxation measurements demonstrate the absence of spin freezing down to 40 mK despite an energy scale of 60 K for antiferromagnetic exchange interactions. From magnetization and heat capacity measurements we conclude that the S=1 spins of the interplane V3+ ions are weakly coupled to the kagome layers, such that DQVOF can be viewed as an experimental model for S=½ kagome physics, and that it displays a gapless spin liquid ground state.

KW - Lattice

KW - Vanadium oxyfluoride

KW - Antiferromagnetic exchange

KW - Kagome layers

U2 - 10.1103/PhysRevLett.110.207208

DO - 10.1103/PhysRevLett.110.207208

M3 - Article

SN - 0031-9007

VL - 110

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

M1 - 207208

ER -