On thermal fluctuations in quantum magnets
The effect of thermal fluctuations on the dynamics of a gapped quantum magnet is studied using inelastic neutron scattering on copper nitrate, a model material for the one-dimensional (1D) bond alternating Heisenberg chain, combined with theoretical and numerical analysis. We observe and interpret t...
| Những tác giả chính: | , , , , , , , , , |
|---|---|
| Định dạng: | Journal article |
| Được phát hành: |
2018
|
| _version_ | 1826256497895538688 |
|---|---|
| author | Tennant, D Notbohm, S Lake, B James, A Essler, F Mikeska, H Fielden, J Kögerler, P Canfield, P Telling, M |
| author_facet | Tennant, D Notbohm, S Lake, B James, A Essler, F Mikeska, H Fielden, J Kögerler, P Canfield, P Telling, M |
| author_sort | Tennant, D |
| collection | OXFORD |
| description | The effect of thermal fluctuations on the dynamics of a gapped quantum magnet is studied using inelastic neutron scattering on copper nitrate, a model material for the one-dimensional (1D) bond alternating Heisenberg chain, combined with theoretical and numerical analysis. We observe and interpret the thermally induced central peak due to intraband scattering as well as the thermal development of an asymmetric continuum of scattering. We relate this asymmetric line broadening to hard core constraints and quasi-particle interactions. Our findings are a counter example to recent assertions of universality of line broadening in 1D systems and are to be considered as a new paradigm of behaviour, applicable to a broad range of quantum systems. |
| first_indexed | 2024-03-06T18:03:10Z |
| format | Journal article |
| id | oxford-uuid:0082b76b-59f4-4dcf-9a6e-556569632029 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:03:10Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | oxford-uuid:0082b76b-59f4-4dcf-9a6e-5565696320292022-03-26T08:29:56ZOn thermal fluctuations in quantum magnetsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0082b76b-59f4-4dcf-9a6e-556569632029Symplectic Elements at Oxford2018Tennant, DNotbohm, SLake, BJames, AEssler, FMikeska, HFielden, JKögerler, PCanfield, PTelling, MThe effect of thermal fluctuations on the dynamics of a gapped quantum magnet is studied using inelastic neutron scattering on copper nitrate, a model material for the one-dimensional (1D) bond alternating Heisenberg chain, combined with theoretical and numerical analysis. We observe and interpret the thermally induced central peak due to intraband scattering as well as the thermal development of an asymmetric continuum of scattering. We relate this asymmetric line broadening to hard core constraints and quasi-particle interactions. Our findings are a counter example to recent assertions of universality of line broadening in 1D systems and are to be considered as a new paradigm of behaviour, applicable to a broad range of quantum systems. |
| spellingShingle | Tennant, D Notbohm, S Lake, B James, A Essler, F Mikeska, H Fielden, J Kögerler, P Canfield, P Telling, M On thermal fluctuations in quantum magnets |
| title | On thermal fluctuations in quantum magnets |
| title_full | On thermal fluctuations in quantum magnets |
| title_fullStr | On thermal fluctuations in quantum magnets |
| title_full_unstemmed | On thermal fluctuations in quantum magnets |
| title_short | On thermal fluctuations in quantum magnets |
| title_sort | on thermal fluctuations in quantum magnets |
| work_keys_str_mv | AT tennantd onthermalfluctuationsinquantummagnets AT notbohms onthermalfluctuationsinquantummagnets AT lakeb onthermalfluctuationsinquantummagnets AT jamesa onthermalfluctuationsinquantummagnets AT esslerf onthermalfluctuationsinquantummagnets AT mikeskah onthermalfluctuationsinquantummagnets AT fieldenj onthermalfluctuationsinquantummagnets AT kogerlerp onthermalfluctuationsinquantummagnets AT canfieldp onthermalfluctuationsinquantummagnets AT tellingm onthermalfluctuationsinquantummagnets |