Spin excitations in the two-dimensional strongly coupled dimer system malachite

E. Canévet; B. Fåk; R. K. Kremer; J. H. Chun; M. Enderle; E. E. Gordon; J. L. Bettis; M. H. Whangbo; J. W. Taylor; D. T. Adroja

doi:10.1103/PhysRevB.91.060402

Spin excitations in the two-dimensional strongly coupled dimer system malachite

E. Canévet
, B. Fåk
, R. K. Kremer
, J. H. Chun
, M. Enderle
, E. E. Gordon
, J. L. Bettis
, M. H. Whangbo
, J. W. Taylor
, D. T. Adroja

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

4 Citations (Scopus)

Abstract

The mineral malachite, Cu₂(OD)₂CO₃, has a quantum spin-liquid ground state and no long-range magnetic order down to at least T=0.4 K. Inelastic neutron scattering measurements show that the excitation spectrum consists of dispersive gapped singlet-triplet excitations, characteristic of spin-1/2 dimer-forming Heisenberg antiferromagnets. We identify a distinct two-dimensional dimerized coupling scheme with strong interdimer coupling J′/J1≈0.3 that places malachite between strongly coupled alternating chains, square lattice antiferromagnets, and infinite-legged ladders. The geometry of the interaction scheme resembles the staggered dimer lattice, which may allow unconventional quantum criticality.

Original language	English
Article number	060402
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.91.060402
Publication status	Published - 20 Feb 2015
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.91.060402

Cite this

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title = "Spin excitations in the two-dimensional strongly coupled dimer system malachite",

abstract = "The mineral malachite, Cu2(OD)2CO3, has a quantum spin-liquid ground state and no long-range magnetic order down to at least T=0.4 K. Inelastic neutron scattering measurements show that the excitation spectrum consists of dispersive gapped singlet-triplet excitations, characteristic of spin-1/2 dimer-forming Heisenberg antiferromagnets. We identify a distinct two-dimensional dimerized coupling scheme with strong interdimer coupling J′/J1≈0.3 that places malachite between strongly coupled alternating chains, square lattice antiferromagnets, and infinite-legged ladders. The geometry of the interaction scheme resembles the staggered dimer lattice, which may allow unconventional quantum criticality.",

author = "E. Can{\'e}vet and B. F{\aa}k and Kremer, \{R. K.\} and Chun, \{J. H.\} and M. Enderle and Gordon, \{E. E.\} and Bettis, \{J. L.\} and Whangbo, \{M. H.\} and Taylor, \{J. W.\} and Adroja, \{D. T.\}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

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doi = "10.1103/PhysRevB.91.060402",

language = "English",

volume = "91",

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

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TY - JOUR

T1 - Spin excitations in the two-dimensional strongly coupled dimer system malachite

AU - Canévet, E.

AU - Fåk, B.

AU - Kremer, R. K.

AU - Chun, J. H.

AU - Enderle, M.

AU - Gordon, E. E.

AU - Bettis, J. L.

AU - Whangbo, M. H.

AU - Taylor, J. W.

AU - Adroja, D. T.

PY - 2015/2/20

Y1 - 2015/2/20

N2 - The mineral malachite, Cu2(OD)2CO3, has a quantum spin-liquid ground state and no long-range magnetic order down to at least T=0.4 K. Inelastic neutron scattering measurements show that the excitation spectrum consists of dispersive gapped singlet-triplet excitations, characteristic of spin-1/2 dimer-forming Heisenberg antiferromagnets. We identify a distinct two-dimensional dimerized coupling scheme with strong interdimer coupling J′/J1≈0.3 that places malachite between strongly coupled alternating chains, square lattice antiferromagnets, and infinite-legged ladders. The geometry of the interaction scheme resembles the staggered dimer lattice, which may allow unconventional quantum criticality.

AB - The mineral malachite, Cu2(OD)2CO3, has a quantum spin-liquid ground state and no long-range magnetic order down to at least T=0.4 K. Inelastic neutron scattering measurements show that the excitation spectrum consists of dispersive gapped singlet-triplet excitations, characteristic of spin-1/2 dimer-forming Heisenberg antiferromagnets. We identify a distinct two-dimensional dimerized coupling scheme with strong interdimer coupling J′/J1≈0.3 that places malachite between strongly coupled alternating chains, square lattice antiferromagnets, and infinite-legged ladders. The geometry of the interaction scheme resembles the staggered dimer lattice, which may allow unconventional quantum criticality.

UR - https://www.scopus.com/pages/publications/84923348193

U2 - 10.1103/PhysRevB.91.060402

DO - 10.1103/PhysRevB.91.060402

M3 - Article

AN - SCOPUS:84923348193

SN - 1098-0121

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 6

M1 - 060402

ER -

Spin excitations in the two-dimensional strongly coupled dimer system malachite

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