Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets
We study the dynamical response of frustrated, quasi-one-dimensional spin-1/2 Heisenberg antiferromagnets at finite temperatures. We allow for the presence of a Dzyaloshinskii-Moriya interaction. We concentrate on a model of weakly coupled planes of anisotropic triangular lattices. Combining exact r...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2001
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| _version_ | 1826261145807224832 |
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| author | Bocquet, M Essler, F Tsvelik, A Gogolin, A |
| author_facet | Bocquet, M Essler, F Tsvelik, A Gogolin, A |
| author_sort | Bocquet, M |
| collection | OXFORD |
| description | We study the dynamical response of frustrated, quasi-one-dimensional spin-1/2 Heisenberg antiferromagnets at finite temperatures. We allow for the presence of a Dzyaloshinskii-Moriya interaction. We concentrate on a model of weakly coupled planes of anisotropic triangular lattices. Combining exact results for the dynamical response of one-dimensional Heisenberg chains with a random-phase approximation in the frustrated interchain couplings, we calculate the dynamical susceptibility in the disordered phase. We investigate the instability of the disordered phase to the formation of collective modes. We find a very weak instability to the formation of incommensurate magnetic order and determine the ordering temperature and wave vector. We also determine the effects of uniform magnetic fields on the ordering transition. |
| first_indexed | 2024-03-06T19:16:56Z |
| format | Journal article |
| id | oxford-uuid:18b9cfb0-792d-4de8-8fae-1e3377e10e6f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:16:56Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:18b9cfb0-792d-4de8-8fae-1e3377e10e6f2022-03-26T10:44:45ZFinite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnetsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:18b9cfb0-792d-4de8-8fae-1e3377e10e6fEnglishSymplectic Elements at Oxford2001Bocquet, MEssler, FTsvelik, AGogolin, AWe study the dynamical response of frustrated, quasi-one-dimensional spin-1/2 Heisenberg antiferromagnets at finite temperatures. We allow for the presence of a Dzyaloshinskii-Moriya interaction. We concentrate on a model of weakly coupled planes of anisotropic triangular lattices. Combining exact results for the dynamical response of one-dimensional Heisenberg chains with a random-phase approximation in the frustrated interchain couplings, we calculate the dynamical susceptibility in the disordered phase. We investigate the instability of the disordered phase to the formation of collective modes. We find a very weak instability to the formation of incommensurate magnetic order and determine the ordering temperature and wave vector. We also determine the effects of uniform magnetic fields on the ordering transition. |
| spellingShingle | Bocquet, M Essler, F Tsvelik, A Gogolin, A Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title | Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title_full | Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title_fullStr | Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title_full_unstemmed | Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title_short | Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets |
| title_sort | finite temperature dynamical magnetic susceptibility of quasi one dimensional frustrated spin 1 2 heisenberg antiferromagnets |
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