Magnetic field dependence of excitations near spin-orbital quantum criticality
<p>The spinel <b>FeSc<sub>2</sub>S<sub>4</sub></b> has been proposed to realize a near-critical spin-orbital singlet (SOS) state, where entangled spin and orbital moments fluctuate in a global singlet state on the verge of spin and orbital order. Here we re...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
American Physical Society
2017
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| _version_ | 1826279592068907008 |
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| author | Biffin, A Rüegg, C Embs, J Guidi, T Cheptiakov, D Loidl, A Tsurkan, V Coldea, R |
| author_facet | Biffin, A Rüegg, C Embs, J Guidi, T Cheptiakov, D Loidl, A Tsurkan, V Coldea, R |
| author_sort | Biffin, A |
| collection | OXFORD |
| description | <p>The spinel <b>FeSc<sub>2</sub>S<sub>4</sub></b> has been proposed to realize a near-critical spin-orbital singlet (SOS) state, where entangled spin and orbital moments fluctuate in a global singlet state on the verge of spin and orbital order. Here we report powder inelastic neutron scattering measurements that observe the full bandwidth of magnetic excitations and we find that spin-orbital triplon excitations of an SOS state can capture well key aspects of the spectrum in both zero and applied magnetic fields up to 8.5 T. The observed shift of low-energy spectral weight to higher energies upon increasing applied field is naturally explained by the entangled spin-orbital character of the magnetic states, a behavior that is in strong contrast to spin-only singlet ground state systems, where the spin gap decreases upon increasing applied field.</p> |
| first_indexed | 2024-03-07T00:01:03Z |
| format | Journal article |
| id | oxford-uuid:75f70719-34db-47ff-a17f-ade4c3d4e788 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:01:03Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:75f70719-34db-47ff-a17f-ade4c3d4e7882022-03-26T20:12:42ZMagnetic field dependence of excitations near spin-orbital quantum criticalityJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:75f70719-34db-47ff-a17f-ade4c3d4e788EnglishSymplectic Elements at OxfordAmerican Physical Society2017Biffin, ARüegg, CEmbs, JGuidi, TCheptiakov, DLoidl, ATsurkan, VColdea, R <p>The spinel <b>FeSc<sub>2</sub>S<sub>4</sub></b> has been proposed to realize a near-critical spin-orbital singlet (SOS) state, where entangled spin and orbital moments fluctuate in a global singlet state on the verge of spin and orbital order. Here we report powder inelastic neutron scattering measurements that observe the full bandwidth of magnetic excitations and we find that spin-orbital triplon excitations of an SOS state can capture well key aspects of the spectrum in both zero and applied magnetic fields up to 8.5 T. The observed shift of low-energy spectral weight to higher energies upon increasing applied field is naturally explained by the entangled spin-orbital character of the magnetic states, a behavior that is in strong contrast to spin-only singlet ground state systems, where the spin gap decreases upon increasing applied field.</p> |
| spellingShingle | Biffin, A Rüegg, C Embs, J Guidi, T Cheptiakov, D Loidl, A Tsurkan, V Coldea, R Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title | Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title_full | Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title_fullStr | Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title_full_unstemmed | Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title_short | Magnetic field dependence of excitations near spin-orbital quantum criticality |
| title_sort | magnetic field dependence of excitations near spin orbital quantum criticality |
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