Investigation of the spin exchange interactions in the nanotube system Na2V3O7 by spin dimer analysis

M. H. Whangbo; H. J. Koo

doi:10.1016/S0038-1098(00)00258-1

Investigation of the spin exchange interactions in the nanotube system Na₂V₃O₇ by spin dimer analysis

M. H. Whangbo, H. J. Koo

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21 Citations (Scopus)

Abstract

The relative magnitudes of the spin exchange interactions expected for the nanotubes of Na₂V₃O₇ were examined by identifying the spin dimers of the nanotube and calculating their spin orbital interaction energies. Our analysis indicates that the spin exchange interactions of the nanotube are not described by three-legged ladders, but by six mutually intersecting helical chains, and the magnetic properties of the nanotube in the low temperature region can be well approximated by those of a single helical chain. Each helical chain is described by four antiferromagnetc spin exchange parameters J₁-J₄ with the repeat sequence [-J₂-J₁-J₃-J₄-]_∞, where |J₁|>|J₂|>|J₃|> |J₄|. The nanotube is expected to have a spin gap.

Original language	English
Pages (from-to)	675-678
Number of pages	4
Journal	Solid State Communications
Volume	115
Issue number	12
DOIs	https://doi.org/10.1016/S0038-1098(00)00258-1
Publication status	Published - 15 Aug 2000

Bibliographical note

Funding Information:
The work at North Carolina State University was supported by the Office of Basic Energy Sciences, Division of Materials Sciences, US Department of Energy, under Grant DE-FG05-86ER45259.

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title = "Investigation of the spin exchange interactions in the nanotube system Na2V3O7 by spin dimer analysis",

abstract = "The relative magnitudes of the spin exchange interactions expected for the nanotubes of Na2V3O7 were examined by identifying the spin dimers of the nanotube and calculating their spin orbital interaction energies. Our analysis indicates that the spin exchange interactions of the nanotube are not described by three-legged ladders, but by six mutually intersecting helical chains, and the magnetic properties of the nanotube in the low temperature region can be well approximated by those of a single helical chain. Each helical chain is described by four antiferromagnetc spin exchange parameters J1-J4 with the repeat sequence [-J2-J1-J3-J4-]∞, where |J1|>|J2|>|J3|> |J4|. The nanotube is expected to have a spin gap.",

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T1 - Investigation of the spin exchange interactions in the nanotube system Na2V3O7 by spin dimer analysis

AU - Whangbo, M. H.

AU - Koo, H. J.

N1 - Funding Information: The work at North Carolina State University was supported by the Office of Basic Energy Sciences, Division of Materials Sciences, US Department of Energy, under Grant DE-FG05-86ER45259.

PY - 2000/8/15

Y1 - 2000/8/15

N2 - The relative magnitudes of the spin exchange interactions expected for the nanotubes of Na2V3O7 were examined by identifying the spin dimers of the nanotube and calculating their spin orbital interaction energies. Our analysis indicates that the spin exchange interactions of the nanotube are not described by three-legged ladders, but by six mutually intersecting helical chains, and the magnetic properties of the nanotube in the low temperature region can be well approximated by those of a single helical chain. Each helical chain is described by four antiferromagnetc spin exchange parameters J1-J4 with the repeat sequence [-J2-J1-J3-J4-]∞, where |J1|>|J2|>|J3|> |J4|. The nanotube is expected to have a spin gap.

AB - The relative magnitudes of the spin exchange interactions expected for the nanotubes of Na2V3O7 were examined by identifying the spin dimers of the nanotube and calculating their spin orbital interaction energies. Our analysis indicates that the spin exchange interactions of the nanotube are not described by three-legged ladders, but by six mutually intersecting helical chains, and the magnetic properties of the nanotube in the low temperature region can be well approximated by those of a single helical chain. Each helical chain is described by four antiferromagnetc spin exchange parameters J1-J4 with the repeat sequence [-J2-J1-J3-J4-]∞, where |J1|>|J2|>|J3|> |J4|. The nanotube is expected to have a spin gap.

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Investigation of the spin exchange interactions in the nanotube system Na₂V₃O₇ by spin dimer analysis

Abstract

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