Kagome lattice antiferromagnets and Dzyaloshinsky-Moriya interactions

Marcos Rigol, Rajiv R.P. Singh

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

We study the consequences of in-plane (Dp) and out-of-plane (Dz) Dzyaloshinsky-Moriya (DM) interactions on the thermodynamic properties of spin- 1 2 Heisenberg model on the kagome lattice using numerical linked cluster expansions and exact diagonalization and contrast them with those of other perturbations such as exchange anisotropy and dilution. We find that different combinations of the DM anisotropies lead to a wide variety of thermodynamic behavior, which are quite distinct from those of most other perturbations. We argue that the sudden upturn seen experimentally in the susceptibility of the material Zn Cu3 (OH)6 Cl2 can be understood in terms of Dzyaloshinsky-Moriya anisotropies with Dp > Dz. We also show that the measured specific heat of the material puts further constraints on the allowed DM parameters.

Original languageEnglish (US)
Article number184403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number18
DOIs
StatePublished - Nov 2 2007

Fingerprint

Anisotropy
anisotropy
perturbation
interactions
Dilution
Specific heat
dilution
Ion exchange
Thermodynamic properties
thermodynamic properties
specific heat
Thermodynamics
magnetic permeability
thermodynamics
expansion

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "We study the consequences of in-plane (Dp) and out-of-plane (Dz) Dzyaloshinsky-Moriya (DM) interactions on the thermodynamic properties of spin- 1 2 Heisenberg model on the kagome lattice using numerical linked cluster expansions and exact diagonalization and contrast them with those of other perturbations such as exchange anisotropy and dilution. We find that different combinations of the DM anisotropies lead to a wide variety of thermodynamic behavior, which are quite distinct from those of most other perturbations. We argue that the sudden upturn seen experimentally in the susceptibility of the material Zn Cu3 (OH)6 Cl2 can be understood in terms of Dzyaloshinsky-Moriya anisotropies with Dp > Dz. We also show that the measured specific heat of the material puts further constraints on the allowed DM parameters.",
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Kagome lattice antiferromagnets and Dzyaloshinsky-Moriya interactions. / Rigol, Marcos; Singh, Rajiv R.P.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 18, 184403, 02.11.2007.

Research output: Contribution to journalArticle

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