Spin dynamics of the spin-1/2 kagome lattice antiferromagnet ZnCu3(OH)6Cl2

J. S. Helton; K. Matan; M. P. Shores; E. A. Nytko; B. M. Bartlett; Y. Yoshida; Y. Takano; A. Suslov; Y. Qiu; J. H. Chung; D. G. Nocera; Y. S. Lee

doi:10.1103/PhysRevLett.98.107204

Spin dynamics of the spin-1/2 kagome lattice antiferromagnet ZnCu3(OH)6Cl2

J. S. Helton, K. Matan, M. P. Shores, E. A. Nytko, B. M. Bartlett, Y. Yoshida, Y. Takano, A. Suslov, Y. Qiu, J. H. Chung, D. G. Nocera, Y. S. Lee

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669 Citations (Scopus)

Abstract

We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagomé lattice antiferromagnet ZnCu3(OH)6Cl2. The susceptibility indicates a Curie-Weiss temperature of θCW-300K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagomé lattice system.

Original language	English
Article number	107204
Journal	Physical review letters
Volume	98
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.98.107204
Publication status	Published - 2007 Mar 9
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.98.107204

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title = "Spin dynamics of the spin-1/2 kagome lattice antiferromagnet ZnCu3(OH)6Cl2",

abstract = "We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagom{\'e} lattice antiferromagnet ZnCu3(OH)6Cl2. The susceptibility indicates a Curie-Weiss temperature of θCW-300K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagom{\'e} lattice system.",

author = "Helton, {J. S.} and K. Matan and Shores, {M. P.} and Nytko, {E. A.} and Bartlett, {B. M.} and Y. Yoshida and Y. Takano and A. Suslov and Y. Qiu and Chung, {J. H.} and Nocera, {D. G.} and Lee, {Y. S.}",

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doi = "10.1103/PhysRevLett.98.107204",

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T1 - Spin dynamics of the spin-1/2 kagome lattice antiferromagnet ZnCu3(OH)6Cl2

AU - Helton, J. S.

AU - Matan, K.

AU - Shores, M. P.

AU - Nytko, E. A.

AU - Bartlett, B. M.

AU - Yoshida, Y.

AU - Takano, Y.

AU - Suslov, A.

AU - Qiu, Y.

AU - Chung, J. H.

AU - Nocera, D. G.

AU - Lee, Y. S.

PY - 2007/3/9

Y1 - 2007/3/9

N2 - We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagomé lattice antiferromagnet ZnCu3(OH)6Cl2. The susceptibility indicates a Curie-Weiss temperature of θCW-300K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagomé lattice system.

AB - We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagomé lattice antiferromagnet ZnCu3(OH)6Cl2. The susceptibility indicates a Curie-Weiss temperature of θCW-300K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagomé lattice system.

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DO - 10.1103/PhysRevLett.98.107204

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Spin dynamics of the spin-1/2 kagome lattice antiferromagnet ZnCu3(OH)6Cl2

Abstract

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